Simplify the following text for a Grade 9 native English-speaking person.
Original: In 1751 , with a bell tower being built in the Pennsylvania State House , civic authorities sought a bell of better quality , which could be heard at a further distance in the rapidly expanding city .
Simplified: In 1751 , a bell tower was built in the Pennsylvania State House , and the leaders there began looking for a bell which could be heard from far away ( the city was growing larger quickly ) .