Simplify the following text for a Grade 6 native English-speaking person.
Original: Since then , Yemenis have been staunch Muslims who were in the forefront of all Islam conquests and Yemenis were the rulers of Islamic Spain for more than 800 years .
Simplified: Many Yemenis can be found in the south of Dearborn , Michigan . In the early 1990s , Yemenis went in search of manufacturing jobs .