( ( A ketone ) ( ( is ( ( an ( organic compound ) ) ( that ( has ( ( a ( carbon atom ) ) ( with ( ( ( a ( double bond ) ) ( to ( an ( oxygen atom ) ) ) ) ( -LRB- ( ( this ( is ( called ( ( carbonyl functional ) group ) ) ) ) -RRB- ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT A) (NN ketone)) (VP (VBZ is) (NP (NP (DT an) (JJ organic) (NN compound)) (SBAR (WHNP (WDT that)) (S (VP (VBZ has) (NP (NP (DT a) (NN carbon) (NN atom)) (PP (IN with) (NP (NP (DT a) (JJ double) (NN bond)) (PP (TO to) (NP (DT an) (NN oxygen) (NN atom))) (PRN (-LRB- -LRB-) (S (NP (DT this)) (VP (VBZ is) (VP (VBN called) (NP (ADJP (JJ carbonyl) (JJ functional)) (NN group))))) (-RRB- -RRB-)))))))))) (. .)))
A ketone is an organic compound that has a carbon atom with a double bond to an oxygen atom (this is called carbonyl functional group).
(ROOT (S (NP (DT An) (NN ether)) (VP (VBZ is) (NP (NP (DT an) (JJ organic) (NN compound)) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (CD two) (NN hydrocarbon) (NNS groups)) (VP (VBP are) (VP (VBG bonded) (PP (TO to) (NP (DT the) (JJ same) (NN oxygen) (NN atom))))))))) (. .)))