( ( This situation ) ( ( is ( called ( ( a ( polar bond ) ) ( ( in which ) ( ( ( the electrons ) ( in ( the bond ) ) ) ( are ( being ( ( ( shared , ) ( but not ) ) ( equally shared ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This) (NN situation)) (VP (VBZ is) (VP (VBN called) (NP (NP (DT a) (JJ polar) (NN bond)) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (NP (DT the) (NNS electrons)) (PP (IN in) (NP (DT the) (NN bond)))) (VP (VBP are) (VP (VBG being) (VP (VP (VBN shared)) (, ,) (CONJP (CC but) (RB not)) (VP (ADVP (RB equally)) (VBN shared)))))))))) (. .)))
This situation is called a polar bond in which the electrons in the bond are being shared, but not equally shared.
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (NNS electrons)) (VP (VBP are) (VP (VBN shared) (ADVP (RB equally)))))) (, ,) (NP (PRP it)) (VP (VBZ is) (VP (VBN called) (NP (NN nonpolar) (NNS bonds)))) (. .)))