Answer:
Lincoln's message in his Gettysburg Address was that the living can honor the wartime dead not with a speech, but rather by continuing to fight for the ideas they gave their lives for.
Explanation:
I am unfamiliar with that vine, honestly. The name Vine gives me nostalgia- what a throwback!
The compound subject is "Young Juan and his father." Both Jaun and his father are the subjects of the sentence, but because there are two of them it means there is a compound subject.