Splitting upper body and lower body from [196,253] tensor

Hello, 

Studying the output of new_joint_vecs, i saw that it has a shape of sequence length, and number of features. 

I'm hoping to ask how do i split the vector provided into upper body (anything above of the pelvis. )

and lower body (anything containing the pelvis and below the pelvis)

I hope you are able to respond to this request.
