I have almost zero knowledge of Latin, but have had a crack at it using Google Translate, trying a few similar phrases, and going backwards and forwards between Latin and English to see if I can understand what's going on where it looked totally incorrect.
What I've got to eventually is:
elephanti homines sunt
I think I'm right with the nominative plural for elephants, not 100% sure I have the right declension for people, and I think sunt is also right. But as I said, this is a complete beginner's effort. A check would be greatly appreciated.