Complex sentence: Songwriter Ritchie Cordell gave them the No.4 hit "I Think We're Alone Now" and the No.10 hit "Mirage" in 1967.
Split into simpler sentences: Songwriter Ritchie Cordell gave them the No.4 hit "I Think We're Alone Now". They also had a No.10 hit with "Mirage" in 1967.