The verb is is because it "is" the plant.
The Vietnam war was broadcasted on live TV
Prepositional Phrase I’m working on the same thing and have a list of those phrases
An independent clause must have
A.subject with its modifiers and a complete verb
<u>B. At least one subject and one verb
</u>
C. Several phases
D. Several subjects each with a verb
I would say the black lives matter organization