Conversation so far:
Howw did Stephen collaborate with James?
Their first collaboration was Sunday in the Park with George (1984).
What did they do together at that time?
They collaborated on Into the Woods (1987), a musical based on several Brothers Grimm fairy tales.
Was this collaboration a success?
CANNOTANSWER.

Question: Did they collaborate in other projects?
Self-contained rewrite: Did Sondheim and Lapine collaborate in other projects aside from Into the Woods?