Simplify the following text for a Grade 7 native English-speaking person.
Original: Acting on Rowe 's verified advice , Kennedy and his police party rode into the Wombat Ranges , where three of them were killed ; and the Kelly Gang was born ( McQuilton , p. 95 ) .
Simplified: Using Rowe 's information , Kennedy and three other policemen rode into the Wombat Ranges to find him . Three of them were killed at Stringybark Creeka , and the Kelly Gang was born .