( ( In addition ) ( , ( it ( ( can ( ( ( travel ( long distances ) ) ( on ( ( ( ( ( land ( between pools ) ) ( of water ) ) , ) ( covering ( ( ( several hundred ) meters ) ( per trip ) ) ) ) ( when ( ( the air ) ( is ( sufficiently humid ) ) ) ) ) ) ) ( -LRB- ( 22 -RRB- ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (NN addition))) (, ,) (NP (PRP it)) (VP (MD can) (VP (VB travel) (NP (JJ long) (NNS distances)) (PP (IN on) (NP (NP (NN land)) (PP (IN between) (NP (NNS pools))) (PP (IN of) (NP (NN water))) (, ,) (VP (VBG covering) (NP (NP (QP (JJ several) (CD hundred)) (NNS meters)) (PP (IN per) (NP (NN trip))))) (SBAR (WHADVP (WRB when)) (S (NP (DT the) (NN air)) (VP (VBZ is) (ADJP (RB sufficiently) (JJ humid))))))) (PRN (-LRB- -LRB-) (NP (CD 22)) (-RRB- -RRB-)))) (. .)))
In addition, it can travel long distances on land between pools of water, covering several hundred meters per trip when the air is sufficiently humid ( 22 ).
(ROOT (S (NP (JJ Meter) (JJ much) (NN distance)) (VP (MD can) (VP (VB beta) (NP (JJ particles) (NN travel)) (PP (IN through) (NP (NN air))))) (. .)))