Dent defended ok on the ground and sunk in a good choke.
That choke was not good at all. He basically had a prone non fighting opponent by that point in the fight and it still took him a long time to set it up and to get into position to finish it.
Lawson completely dominated Dent in the first round and if he didn't gas so badly I am sure the second round would have been more of the same.
All in all - that fight sucked hard.