Conversation so far:
Where was Piet Mondrian born in?
piet mondrian was born in Amersfoort in the Netherlands
What is Piet Mondrain's father job?
Piet Mondrian's father was a qualified drawing teacher
What are the paintings Piet Mondrian made?
Piet Mondrian paintings The Red Mill and Trees in Moonrise“

Question: What was Mondrian works were influenced by?
Self-contained rewrite: What was Pirt Mondrian works were influenced by?