What is the fine-grained topic of the following text: Over the wistful, soul-sampled Just Blaze beat that backed Jay Electronica&apos;s Booth-acclaimed Exhibit C, the Left Coast heavyweight empties out his rhyme book, spitting extensively about his cars, his mic skills, his beef with G-Unit, and pretty much everything else under the sun. Only return the topic.
A Left Coast heavyweight rapper's lyric content and style.