Simplify the following text for a Grade 7 native English-speaking person.
Original: On 9 August 1969 , while Polanski was working in London , his wife , Sharon Tate , and four other people were murdered at the Polanskis ' residence in Los Angeles .
Simplified: In August 1969 , Polanski was in London , and Tate was pregnant . Tate and some their friends were murdered in Los Angeles , California , by people who followed Charles Manson .