Conversation so far:
What was Marc Chagall doing in France in 1923?
In 1923, Chagall left Moscow to return to France.
What was Marc Chagall looking to do once he returned to France in 1923?
after returning to Paris he again rediscovered the free expansion and fulfillment which were so essential to him“

Question: What kind of pictures he was into or did?
Self-contained rewrite: What kind of pictures Marc Chagall was into or did?