Conversation so far:
When did Dinosaur Jr. form?
Dinosaur Jr. was initially named Mogo, and played their first show on University of Massachusetts Amherst campus in the first week of September 1984. The trio named themselves Dinosaur.
How did Dinosaur Jr. decide on the name?
Immediately following the release of You're Living All Over Me, supergroup The Dinosaurs sued then Dinosaur over the use of the name, prompting the addition of Jr.

Question: Did they sign onto a label?
Self-contained rewrite: Did Dinosaur Jr. sign onto a label?