Simplify the following text for a Grade 10 native English-speaking person.
Original: It was the second WrestleMania held in the state of Texas , with the first being WrestleMania X-Seven , at the Reliant Astrodome , also in Houston , which was held in 2001 .
Simplified: It was the second WrestleMania to be held in Houston , with the first being WrestleMania X-Seven at the Reliant Astrodome , which was held in 2001 .