[Right triangle ⏵ may be expanded, down triangle ⏷ to close. Button = tree pop-up. × = close pop-up.]

Terminal: run. Derivation Graphs: (left-to-right) compact / full; (top-down) full / compact.

Help: blue = parse inside. Abbr.: WS: Workspace; Initial WS: initial heads for Merge after LEX lookup.

WS n, n = 1,2,... for intermediate stages after Initial WS. Final WS: when WS items converge on a single SO.
Bracketing: {...} (Merge). {...} (FormSet). At Spellout, {...} indicates free word order. [word] indicates word is optionally present.
Head Hd_{selection/features}, e.g. p_θ = predicate head p that seeks a θ-relevant (θR) IA from the WS. p_θ is a θ-seeker (θS).
v_see:θ:pst = head v has complement see, a θR EA from the WS and TNS. v is also a θS.
INFL seeks θR from its complement (not the WS).
Complementizer C comes in different flavors wrt. Force, .e.g. declarative C, interrogative C_Q and relative clause head C_rel.
Features, e.g. TNS pres/pst or DET the/a (shorthand for a bundle of semantic features).
Note: φ-features, e.g. 1sg, appear only at Spellout. Some words do not project, turn into features, e.g. determiners.

Words: él le gusta a ella

Initial WS 1: ella_a appl_θ gustar_appl:_θ v_gustar:_pres INFL_v:_3sg le él

Initial WS 2: ella_a appl_θ:_le gustar_appl:_θ v_gustar:_pres INFL_v:_3sg él

WS 1: {appl_θ:_le, pro_:_{3sg-_32942}} ella_a gustar_appl:_θ v_gustar:_pres INFL_v:_3sg él

WS 2: {gustar_appl:_θ, {appl_θ:_le, pro_:_{3sg-_32942}}} ella_a v_gustar:_pres INFL_v:_3sg él

WS 3: {ella_a, {gustar_appl:_θ, {appl_θ:_le, pro_:_{3sg-_32942}}}} v_gustar:_pres INFL_v:_3sg él

WS 4: {v_gustar:_pres, {ella_a, {gustar_appl:_θ, {appl_θ:_le, pro_:_{3sg-_526}}}}} INFL_v:_3sg él

WS 5: {INFL_v:_3sg, {v_gustar:_pres, {ella_a, {gustar_appl:_θ, {appl_θ:_le, pro_:_{3sg-_526}}}}}} él

WS 1: {appl_θ:_le, pro_:_{3sg-_32942}} ella_a gustar_appl:_θ v_gustar:_pres INFL_v:_3sg él

WS 2: {gustar_appl:_θ, {appl_θ:_le, pro_:_{3sg-_32942}}} ella_a v_gustar:_pres INFL_v:_3sg él [gray]

WS 3: {él, {gustar_appl:_θ, {appl_θ:_le, pro_:_{3sg-_526}}}} ella_a v_gustar:_pres INFL_v:_3sg

WS 4: {v_gustar:_pres, {él, {gustar_appl:_θ, {appl_θ:_le, pro_:_{3sg-_526}}}}} ella_a INFL_v:_3sg

WS 5: {INFL_v:_3sg, {v_gustar:_pres, {él, {gustar_appl:_θ, {appl_θ:_le, pro_:_{3sg-_526}}}}}} ella_a

WS 1: {appl_θ:_le, pro_:_{3sg-_32942}} ella_a gustar_appl:_θ v_gustar:_pres INFL_v:_3sg él

WS 2: {gustar_appl:_θ, {appl_θ:_le, pro_:_{3sg-_32942}}} ella_a v_gustar:_pres INFL_v:_3sg él [gray]

WS 3: {ella_a, él} {gustar_appl:_θ, {appl_θ:_le, pro_:_{3sg-_526}}} v_gustar:_pres INFL_v:_3sg

WS 4: {{ella_a, él}, {gustar_appl:_θ, {appl_θ:_le, pro_:_{3sg-_526}}}} v_gustar:_pres INFL_v:_3sg

WS 5: {v_gustar:_pres, {{ella_a, él}, {gustar_appl:_θ, {appl_θ:_le, pro_:_{3sg-_526}}}}} INFL_v:_3sg

WS 6: {INFL_v:_3sg, {v_gustar:_pres, {{ella_a, él}, {gustar_appl:_θ, {appl_θ:_le, pro_:_{3sg-_526}}}}}}

Final WS: {C, {INFL_v:_3sg, {v_gustar:_pres, {{ella_a, él}, {gustar_appl:_θ, {appl_θ:_le, pro_:_{3sg-_526}}}}}}}

INT/EXT: {C, {INFL_v:_3sg, {v_gustar:_pres, {{ella_a, él}, {gustar_appl:_θ, {appl_θ:_le, pro_:_{3sg-_526}}}}}}}

EXT: {[a,ella],y,él} 3sg-f pres gustar cl_le

Spellout: {[a,ella],y,él} le gusta

Blocked: inconsistent with input!

EXT: 3sg-f pres gustar {[a,ella],y,él} cl_le

Spellout: le gusta {[a,ella],y,él}

Blocked: inconsistent with input!

WS 1: {appl_θ:_le, pro_:_{3sg-_32942}} ella_a gustar_appl:_θ v_gustar:_pres INFL_v:_3sg él

WS 2: {ella_a, él} {appl_θ:_le, pro_:_{3sg-_526}} gustar_appl:_θ v_gustar:_pres INFL_v:_3sg

WS 1: {appl_θ:_le, ella_a} gustar_appl:_θ v_gustar:_pres INFL_v:_3sg él

WS 2: {gustar_appl:_θ, {appl_θ:_le, ella_a}} v_gustar:_pres INFL_v:_3sg él

WS 3: {él, {gustar_appl:_θ, {appl_θ:_le, ella_a}}} v_gustar:_pres INFL_v:_3sg

WS 4: {v_gustar:_pres, {él, {gustar_appl:_θ, {appl_θ:_le, ella_a}}}} INFL_v:_3sg

WS 5: {INFL_v:_3sg, {v_gustar:_pres, {él, {gustar_appl:_θ, {appl_θ:_le, ella_a}}}}}

Final WS: {C, {INFL_v:_3sg, {v_gustar:_pres, {él, {gustar_appl:_θ, {appl_θ:_le, ella_a}}}}}}

INT/EXT: {C, {INFL_v:_3sg, {v_gustar:_pres, {él, {gustar_appl:_θ, {appl_θ:_le, ella_a}}}}}}

EXT: él 3sg-m pres gustar cl_le a ella

Spellout: él le gusta a ella

Parse found: él 3sg-m pres gustar cl_le a ella

EXT: 3sg-m pres gustar él cl_le a ella

Spellout: le gusta él a ella

Blocked: inconsistent with input!

EXT: a ella 3sg-m pres gustar él cl_le

Spellout: a ella le gusta él

Blocked: inconsistent with input!

WS 1: {appl_θ:_le, él} ella_a gustar_appl:_θ v_gustar:_pres INFL_v:_3sg

WS 2: {gustar_appl:_θ, {appl_θ:_le, él}} ella_a v_gustar:_pres INFL_v:_3sg

WS 3: {ella_a, {gustar_appl:_θ, {appl_θ:_le, él}}} v_gustar:_pres INFL_v:_3sg

WS 4: {v_gustar:_pres, {ella_a, {gustar_appl:_θ, {appl_θ:_le, él}}}} INFL_v:_3sg

WS 5: {INFL_v:_3sg, {v_gustar:_pres, {ella_a, {gustar_appl:_θ, {appl_θ:_le, él}}}}}

Final WS: {C, {INFL_v:_3sg, {v_gustar:_pres, {ella_a, {gustar_appl:_θ, {appl_θ:_le, él}}}}}}

INT/EXT: {C, {INFL_v:_3sg, {v_gustar:_pres, {ella_a, {gustar_appl:_θ, {appl_θ:_le, él}}}}}}

Error: Case: object "él" not DAT

WS 1: {ella_a, él} appl_θ:_le gustar_appl:_θ v_gustar:_pres INFL_v:_3sg

WS 2: {appl_θ:_le, {ella_a, él}} gustar_appl:_θ v_gustar:_pres INFL_v:_3sg

WS 3: {gustar_appl:_θ, {appl_θ:_le, {ella_a, él}}} v_gustar:_pres INFL_v:_3sg

WS 4: {{ella_a, él}, {gustar_appl:_θ, {appl_θ:_le, {ella_a, él}}}} v_gustar:_pres INFL_v:_3sg

WS 5: {v_gustar:_pres, {{ella_a, él}, {gustar_appl:_θ, {appl_θ:_le, {ella_a, él}}}}} INFL_v:_3sg

WS 6: {INFL_v:_3sg, {v_gustar:_pres, {{ella_a, él}, {gustar_appl:_θ, {appl_θ:_le, {ella_a, él}}}}}}

Final WS: {C, {INFL_v:_3sg, {v_gustar:_pres, {{ella_a, él}, {gustar_appl:_θ, {appl_θ:_le, {ella_a, él}}}}}}}

INT/EXT: {C, {INFL_v:_3sg, {v_gustar:_pres, {{ella_a, él}, {gustar_appl:_θ, {appl_θ:_le, {ella_a:,él}}}}}}}

EXT: {[a,ella],y,él} 3sg-f pres gustar cl_le

Spellout: {[a,ella],y,él} le gusta

Blocked: inconsistent with input!

EXT: 3sg-f pres gustar {[a,ella],y,él} cl_le

Spellout: le gusta {[a,ella],y,él}

Blocked: inconsistent with input!

EXT: {[a,ella],y,él} 3sg-f pres gustar cl_le

Spellout: {[a,ella],y,él} le gusta

Blocked: inconsistent with input!