Approximately how many people lined up for the event which gave Sooners their designation?
Sooners: Sooners is the name given to settlers who entered the Unassigned Lands in what is now the state of Oklahoma before the official start of the Land Rush of 1889. Land Rush of 1889:  The land run started at high noon on April 22, 1889, with an estimated 50,000 people lined up for their piece of the available two million acres (8,000 km²).
50,000