Labels semantic roles (who did what to whom) in Spanish sentences.

Identifies predicate-argument structures and assigns semantic roles:

• Agent (A0): who performs the action
• Patient/Theme (A1): what is affected
• Instrument (A2): with what
• Beneficiary (A3): for whom
• Adjuncts: where, when, why, how

Spanish-Specific Features

• Flexible word order (SVO, VSO, VOS)
• Pro-drop subjects (null agent)
• Clitic pronouns encoding roles (lo, la, le, les)
• Reflexive constructions (se)
• Prepositional role markers (a, de, en, con, por, para)

Example

iex> sentence = parse("María le dio un libro a Juan ayer")
iex> roles = SemanticRoleLabeler.label(sentence)
%{
  predicate: "dio",
  arguments: [
    %{role: :agent, text: "María"},
    %{role: :theme, text: "un libro"},
    %{role: :recipient, text: "a Juan"},
    %{role: :time, text: "ayer"}
  ]
}