 providing evidence for supporting the theory that liquid oceans exist under Europa 's icy surface ; 
 providing evidence for supporting the theory <a href='null_relcl' title='1'><mark>that</mark></a>liquid oceans exist under Europa <a href='null_genetive' title='2'><mark>'s</mark></a>icy surface ; 
Providing evidence for supporting the theory liquid oceans exist under Europa  icy surface ;