Simplify the following text for a Grade 7 native English-speaking person.
Original: In summer 1973 , Pang was working on the recording of Lennon 's Mind Games album . Lennon and Ono were having marital problems and decided to separate , and Ono suggested to Pang that she become Lennon 's companion .
Simplified: When Lennon and wife Ono needed an assistant , Pang was sent to England to work for them .