( Mars ( ( has ( ( a ( reddish tint ) ) ( caused ( by ( lots ( of ( ( red dust ) ( called ( iron oxide ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Mars)) (VP (VBZ has) (NP (NP (DT a) (JJ reddish) (NN tint)) (VP (VBN caused) (PP (IN by) (NP (NP (NNS lots)) (PP (IN of) (NP (NP (JJ red) (NN dust)) (VP (VBN called) (NP (NN iron) (NN oxide)))))))))) (. .)))
Mars has a reddish tint caused by lots of red dust called iron oxide.
(ROOT (S (NP (NP (NNP Iron)) (PP (IN in) (NP (DT the) (NN soil)))) (VP (VBZ causes) (S (NP (NNS mars)) (VP (TO to) (VP (VB look) (ADJP (JJ red)))))) (. .)))