This is a compound sentence because it is two independent cluases joined by a conjunction (after). A complex sentence would be one independent clause and one dependent clause joined with a conjunction and a simple sentence is just a sentence with one independent clause.
At the time they where starving and found hope in the native to show how to grow corn
He sent away Martin’s mother and sister because the story is only for Martin to hear!
Hi there. I believe it is 50 characters long if I am not mistaken. I have microsoft so I'm pretty sure I'm right. Hope I helped you!