Simplify the following text for a Grade 10 native English-speaking person.
Original: After the immunity challenge , Shane told Bobby that Bruce was the next to go , as his tribe was worried he would join La Mina 's alliance when the tribes merged ( combine ) .
Simplified: After the immunity challenge , Shane told Bobby that Bruce was the next to go , as his tribe feared he would flip over to La Mina 's alliance come time of the merge .