gameid year credits1 credits2
1 1996 Aleksandr Kravchuk,Alexey Menshikov,Alexey Menshikov,Rostislav Garbar George Bain,Ted Regulski
2 1995 David H. Tolley,David H. Tolley,Steven Metcalf,Steven Metcalf James Tripp,Paul Margrave,Steven Metcalf
Hi everyone,

I have a dataset of people's credit for a video game portrayed in the table above. Each name is separated by a comma, and it varies from 5 people to 1500people.
Is there a way to see how many names are in common between two variables of credits1 and credits 1?
I was searching through the forum but could not find any topic about finding a number of matching multiple words separated by a comma.

Thank you!