( Droughts ( ( occur ( in ( ( ( areas ( where ( there ( has ( been little ) ) ) ) ) or ) ( ( no rain ) ( for ( ( a ( long period ) ) ( of time ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Droughts)) (VP (VBP occur) (PP (IN in) (NP (NP (NP (NNS areas)) (SBAR (WHADVP (WRB where)) (S (NP (EX there)) (VP (VBZ has) (VP (VBN been) (ADJP (JJ little))))))) (CC or) (NP (NP (DT no) (NN rain)) (PP (IN for) (NP (NP (DT a) (JJ long) (NN period)) (PP (IN of) (NP (NN time))))))))) (. .)))
Droughts occur in areas where there has been little or no rain for a long period of time.
(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)))))))))))) (. .)))