sentence: I have one big sister , Anisa . She is 18 years old , and I also have two younger sisters ; Alicia , 8 years old and Isabel , 4 years old .
modified: I have one big sister , Anisa , she is 18 years old , and I also have two younger sisters ; Alicia 8 years old and Isabel 4 years old .
transformation: PUNCT, PUNCT, PUNCT