Conversation so far:
What were the songwriting lawsuits involving the Beach Boys?
A lawsuit was filed by Brian Wilson in 1989 to reclaim the rights to his songs and the Beach Boys' defunct publishing company, Sea of Tunes.

Question: From who?
Self-contained rewrite: Brian Wilson filed a lawsuit in 1989 to reclaim the rights to his songs and the Beach Boys' defunct publishing company, Sea of Tunes, from who?