( ( ( ( Political and ) ( ( economic upheaval ) ( in ( countries ( like ( ( Iraq and ) Yemen ) ) ) ) ) ) ( has ( caused ( ( ( increasing numbers ) ( of ( Arab Muslims ) ) ) ( to ( move ( into ( ( the area ) ( over ( the ( last ( few years ) ) ) ) ) ) ) ) ) ) ) ) ( , ( experts ( say . ) ) ) )
(ROOT (S (S (NP (NP (NNP Political)) (CC and) (NP (NP (JJ economic) (NN upheaval)) (PP (IN in) (NP (NP (NNS countries)) (PP (IN like) (NP (NNP Iraq) (CC and) (NNP Yemen))))))) (VP (VBZ has) (VP (VBN caused) (NP (NP (VBG increasing) (NNS numbers)) (PP (IN of) (NP (NNP Arab) (NNPS Muslims))) (S (VP (TO to) (VP (VB move) (PP (IN into) (NP (NP (DT the) (NN area)) (PP (IN over) (NP (DT the) (JJ last) (JJ few) (NNS years)))))))))))) (, ,) (NP (NNS experts)) (VP (VBP say)) (. .)))
Political and economic upheaval in countries like Iraq and Yemen has caused increasing numbers of Arab Muslims to move into the area over the last few years, experts say.
(ROOT (S (NP (DT A) (JJR fewer) (NNS predators)) (VP (VBZ is) (ADJP (RBS most) (JJ likely) (S (VP (TO to) (VP (VB cause) (NP (NP (DT the) (NN number)) (PP (IN of) (NP (NP (NNS rabbits)) (VP (VBG living) (PP (IN in) (NP (DT an) (NN area))) (S (VP (TO to) (VP (VB increase))))))))))))) (. .)))
A fewer predators is most likely to cause the number of rabbits living in an area to increase.