Who also provided lyrics along with Howard Ashman on his first Disney duo movie with Alan Menken?
The Little Mermaid (musical):  Its book is by Doug Wright, music by Alan Menken and lyrics by Howard Ashman (written for the film), with additional lyrics by Glenn Slater. Howard Ashman:  The partnership's first Disney film was "The Little Mermaid" (1989), followed by "Beauty and the Beast" (1991).
Glenn Slater