Predicate: darken
Frames file for 'darken' based on sentences in brown. Verbnet entry
45.4, big surprise.
Roleset id: darken.01 , (cause to) become dark, vncls: 45.4
Roles:
        Arg0: causer of darkening
        Arg1: thing becoming dark
Example: unaccusative
        person: ns,  tense: past,  aspect: ns,  voice: active,  form: full
        He darkened under his heavy burn.
       
        Arg1 : He
        Rel : darkened
        Argm-LOC : under his heavy burn
Example: transitive
        person: ns,  tense: past,  aspect: ns,  voice: active,  form: full
        For a moment, anger darkened the hallway about her, and when she
        found her voice, anger thickened it.
       
        Argm-TMP : For a moment
        Arg0 : anger
        Rel : darkened
        Arg1 : the hallway about her
Example: pretentious literary usage
        person: ns,  tense: ns,  aspect: progressive,  voice: active,  form: participle
        The darkening world scene, at the time of the Munich Pact,
        continued to trouble his mind even in his remote Virginia
        studio.
       
        Rel : darkening
        Arg1 : [world][scene]