Simplify the following text for a Grade 9 native English-speaking person.
Original: Syrian Americans are also numerous in Southern California ( i.e. the Los Angeles and San Diego areas ) and Arizona , many are descendants of farm laborers invited with their farm skills to irrigate the deserts in the early 20th century . .
Simplified: Syrian Americans are also numerous in Southern California ( i.e. the Los Angeles and San Diego areas ) and Arizona .