What is the fine-grained topic of the following text: LAS VEGAS, NV - DeDe Davidson, Las Vegas, Nev., averaged 256.88 to capture the first round lead in the Sam's Town Invitational at Sam's Town Bowling Center in Las Vegas, Nev., Monday afternoon. Only return the topic.
DeDe Davidson leading the first round of Sam's Town Invitational Bowling tournament in Las Vegas