Conversation so far:
who owns cheesecake factory and p f changs
The Cheesecake Factory was founded by Evelyn Overton.
who founded P F Chang's
P. F. Chang's China Bistro is an American-based, Asian-themed, casual dining restaurant chain founded in 1993 by Paul Fleming and Philip Chiang.
do Paul Fleming and Philip Chiang own P F Chang's
Centerbridge Partners owned and operated Chang's until acquired by TriArtisan Capital Advisors on March 2, 2019.

Question: how many restaurants do they have
Self-contained rewrite: how many restaurants does P F Chang's have