( ( ( An ( ionic liquid ) ) ( -LRB- ( IL -RRB- ) ) ) ( ( is ( ( a salt ) ( in ( the ( liquid state ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT An) (JJ ionic) (NN liquid)) (PRN (-LRB- -LRB-) (NP (NNP IL)) (-RRB- -RRB-))) (VP (VBZ is) (NP (NP (DT a) (NN salt)) (PP (IN in) (NP (DT the) (JJ liquid) (NN state))))) (. .)))
An ionic liquid (IL) is a salt in the liquid state.
(ROOT (S (NP (NNP Ionic)) (VP (VBZ compounds) (NP (NP (JJS best) (NN conduct) (NN electricity)) (PP (IN in) (NP (DT a) (JJ liquid) (NN state))))) (. .)))