( ( A ( current interest ) ) ( ( is ( ( the ( remote ( ( control and ) guidance ) ) ) ( of ( ( ( ( ( various types ) ( of ( remote vehicles ) ) ) , ) particularly ) ( ( ( free-flight and ) tethered ) rotorcraft ) ) ) ) ) . ) )
(ROOT (S (NP (DT A) (JJ current) (NN interest)) (VP (VBZ is) (NP (NP (DT the) (JJ remote) (NN control) (CC and) (NN guidance)) (PP (IN of) (NP (NP (NP (JJ various) (NNS types)) (PP (IN of) (NP (JJ remote) (NNS vehicles)))) (, ,) (RB particularly) (NP (ADJP (JJ free-flight) (CC and) (JJ tethered)) (NN rotorcraft)))))) (. .)))
A current interest is the remote control and guidance of various types of remote vehicles, particularly free-flight and tethered rotorcraft.
(ROOT (S (NP (NNP Remote-control) (NNS vehicles)) (VP (VBP are) (ADJP (JJ able) (S (VP (TO to) (VP (VB go) (PP (TO to) (NP (DT the) (JJS deepest) (NN ocean) (NN floor)))))))) (. .)))