Predicate: croon
croon: Frames file for 'croon' based on survey of sentences in the WSJ
corpus.
Roleset id: croon.01 , to hum or sing softly, vncls: 37.3, framnet:
Roles:
        Arg0: singer (vnrole: 37.3-Agent)
        Arg1: song (vnrole: 37.3-Topic)
Example: transitive
        person: third,  tense: present,  aspect: ns,  voice: active,  form: full
        `` The beautiful look of wool , '' croons *trace* the show 's narrator , `` slightly Victorian in its influence ... . ''
        Arg1: *trace*
        ArgM-DSP: *trace* -> [ The beautiful look of wool] [ slightly Victorian in its influence]
        Rel: croons
        Arg0: the show 's narrator