Simplify the following text for a Grade 7 native English-speaking person.
Original: During the second episode the Viveros and Bayoneta tribes were dissolved and in a `` schoolyard pick '' with only Casaya and La Mina making two new integrated tribes .
Simplified: During the second episode , the tribes were switched so that there would only be two tribes , Casaya , and La Mina . Bayoneta and Viveros no longer existed .