Sentence:  The countrywide success of `` Lazybones '' and `` And the Angels Sing '' could only lead to Hollywood , where , besides Harold Arlen , Mercer <WSD>collaborated</WSD> with Harry Warren , Jimmy Van Heusen , Richard Whiting , Walter Donaldson , Jerome Kern , and Arthur Schwartz . 
Meaning of the word marked with <WSD> tags:  work together on a common enterprise of project