Hoping that there's a few people on here who are better at identifying plants than I am, I'll post a picture of this here. It's growing on our property, is now about 10' tall, and round up hasn't come close to killing it. It's growing right next to a burn pile which I don't want to light if it is sumac due to the vapors (been there, SCREW that!). The leaf structure has 7 or 9 leaves to a branch with some ending with these berries. Any ideas?