( Droughts ( ( are ( ( a ( long time ) ) ( with ( no rain ) ) ) ) . ) )
(ROOT (S (NP (NNS Droughts)) (VP (VBP are) (NP (NP (DT a) (JJ long) (NN time)) (PP (IN with) (NP (DT no) (NN rain))))) (. .)))
Droughts are a long time with no rain.
(ROOT (S (NP (NNS Droughts)) (VP (VBZ occurs) (SBAR (WHADVP (WRB when)) (S (NP (EX there)) (VP (VBZ is) (ADJP (JJ little) (PP (TO to) (NP (NP (DT no) (NN rain)) (PP (IN in) (NP (NP (DT a) (NN period)) (PP (IN of) (NP (NN time)))))))))))) (. .)))