Couldn't exactly find the answer in other threads. Here's what I'm trying to accomplish:
In the below example I want to apply a GREP style by finding only the title of the artwork. In this case, only the information before the comma on the first line.
My Beautiful Painting #3, 1999. Oil on canvas 25 x 25cm Gift of the artist.
I think this needs to be done via the "positive lookbehind" match function, but I can't seem to figure out the syntax.