( ( If ( ( the ( atoms share ) ) ( electrons equally ) ) ) ( , ( ( the bond ) ( ( is non-polar ) . ) ) ) )
(ROOT (S (SBAR (IN If) (S (NP (DT the) (NNS atoms) (NN share)) (VP (VBZ electrons) (ADVP (RB equally))))) (, ,) (NP (DT the) (NN bond)) (VP (VBZ is) (ADJP (JJ non-polar))) (. .)))
If the atoms share electrons equally, the bond is non-polar.
(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)))) (. .)))