Simplify the following text for a Grade 4 native English-speaking person.
Original: At 7 feet , 7 inches ( 2.31 meters ) , Bol was one of the tallest players ever to appear in the National Basketball Association , along with Gheorghe MureÅ an .
Simplified: Bol was 7 feet , 7 inches tall , and was one of only two people that tall to play in the NBA . The other is former NBA center Gheorghe MureÅ an .