Student or Learner
its about who , which and that clouses and how can we short them
1) John , who is studing english literature , is my brother.
John , studing english literature , is my brother.
2) Sara , how has long hair ,wants to leave school .
Sara wants to leave school .
My quastion is why do we shortent the 2 senteces in diffrent ways
... And "studying" instead of "studing"