( ( When ( we ( ( look closely ) ( at ( this table ) ) ) ) ) ( , ( we ( ( notice ( that ( ( three ( functional groups ) ) ( have ( ( ( double ( or ( triple ( carbon-carbon bonds ) ) ) ) , ) ( regions ( of ( high ( electron density ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (PRP we)) (VP (VBP look) (ADVP (RB closely)) (PP (IN at) (NP (DT this) (NN table)))))) (, ,) (NP (PRP we)) (VP (VBP notice) (SBAR (IN that) (S (NP (CD three) (JJ functional) (NNS groups)) (VP (VBP have) (NP (NP (VB double) (CC or) (RB triple) (NN carbon-carbon) (NNS bonds)) (, ,) (NP (NP (NNS regions)) (PP (IN of) (NP (JJ high) (NN electron) (NN density))))))))) (. .)))
When we look closely at this table, we notice that three functional groups have double or triple carbon-carbon bonds, regions of high electron density.
(ROOT (S (PP (IN In) (NP (DT a) (NN carbon) (JJ triple) (NN bond))) (, ,) (NP (NP (CD three) (NNS pairs)) (PP (IN of) (NP (NNS electrons)))) (VP (VBP are) (VP (VBN shared))) (. .)))