Original sentence: A second GM norm was earned at the Philadelphia International Tournament, June 25th-29th, 2009.Lenderman earned his first Grandmaster norm at the Copper State International tournament in Mesa AZ, May 29th to June 3rd, 2009.Lenderman earned his third GM norm on July 5th, 2009 at the World Open in Philadelphia
Edited sentence: A second GM norm was earned at the Philadelphia International Tournament, June 25-29, 2009.Lenderman earned his first Grandmaster norm at the Copper State International tournament in Mesa AZ, May 29 to June 3, 2009.Lenderman earned his third GM norm on July 5, 2009 at the World Open in Philadelphia