Complex sentence: RadioShack is an American chain of wireless and electronics stores, founded in 1921 and since 2017 has approximately 28 remaining corporate locations, which are owned by General Wireless Operations, Inc., who are leasing the name from Kensington Capital Holdings.
Split into simpler sentences: RadioShack is an American chain of wireless and electronics stores, founded in 1921. Since 2017, it has had approximately 28 remaining corporate locations, which are owned by General Wireless Operations, Inc., who are leasing the name from Kensington Capital Holdings.