I find this a tough call. The height/reach advantage is huge, but then again, Monson is probably quite used to it - he must always be the shorter guy. And Sylvia does not strike me as unstoppable. But man, it's not hard to imagine a head kick from Sylvia ending this.
But I'll go with Monson submitting Sylvia. I don't think it'll go past the 2nd round.
1. a finishing stroke; anything that effectually ends or settles
2. discharge or release from life.
3. a period of retirement or inactivity.