original: this split the tigers into two groups which then went on to develop independently .
simplifications: this split the tigers into two groups which went on to develop on their own . this split the tigers into two groups which then went on to develop independently . this split the tigers into two groups and they evolved independently . this split the tigers into two groups which then went on to develop on their own . after the split the two groups of tigers went on to develop independently . this split the tigers into two groups which went to develop independently . two groups of tigers went on to develop independently , then . this split the tigers into two groups which then went on to develop independently .