Question: When did the 2011 first round draft take place that Casy Matthews was a part of?
Sentence (from "2011 NFL Draft"): Like the 2010 draft, the 2011 draft was held at Radio City Music Hall in New York City, New York, over three days: this year, the first round took place on Thursday, April 28, 2011; the second and third rounds took place on Friday, April 29; with the final four rounds on Saturday, April 30, 2011.
Relevant evidence: Yes