( ( ( A ( few insects ) ) ( -LRB- ( ( ( ( water striders ) , ) ( Gerris remigis ) ) -RRB- ) ) ) ( actually ( ( can ( walk ( on water ) ) ) . ) ) )
(ROOT (S (NP (NP (DT A) (JJ few) (NNS insects)) (PRN (-LRB- -LRB-) (NP (NP (NN water) (NNS striders)) (, ,) (NP (NNP Gerris) (NNS remigis))) (-RRB- -RRB-))) (ADVP (RB actually)) (VP (MD can) (VP (VB walk) (PP (IN on) (NP (NN water))))) (. .)))
A few insects (water striders, Gerris remigis ) actually can walk on water.
(ROOT (S (NP (JJ Surface) (NN tension)) (VP (VBZ is) (ADJP (JJ responsible) (PP (IN for) (NP (DT the) (NN fact)))) (SBAR (IN that) (S (NP (JJ small) (NNS insects)) (VP (MD can) (VP (VB walk) (PP (IN on) (NP (NN water)))))))) (. .)))