Complex sentence: While living in Santa Clarita, he swam for the club team Canyons Aquatic Club, and also competed on his high school's swim team at Hart High School in Newhall, CA before attending UC Berkeley, where he received his B.A. in English.
Split into simpler sentences: While living in Santa Clarita, he swam for the club team Canyons Aquatic Club. Ervin also swam on the school team at Hart High School in Newhall, CA before attending UC Berkeley, where he received his B.A. in English.