( ( ( ( ( The ( Mars ( Exploration Rovers ) ) ) , ) ( ( launched ( by ( NASA ( in 2003 ) ) ) ) ( to ( explore ( ( the surface ) ( of Mars ) ) ) ) ) ) , ) ( ( are ( equipped ( with ( ( unique cameras ) ( that ( allow ( researchers ( to ( view ( ( stereoscopic images ) ( of ( ( the surface ) ( of Mars ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NNP Mars) (NNP Exploration) (NNP Rovers)) (, ,) (VP (VBN launched) (PP (IN by) (NP (NP (NNP NASA)) (PP (IN in) (NP (CD 2003))))) (S (VP (TO to) (VP (VB explore) (NP (NP (DT the) (NN surface)) (PP (IN of) (NP (NNP Mars)))))))) (, ,)) (VP (VBP are) (ADJP (VBN equipped) (PP (IN with) (NP (NP (JJ unique) (NNS cameras)) (SBAR (WHNP (WDT that)) (S (VP (VBP allow) (S (NP (NNS researchers)) (VP (TO to) (VP (VB view) (NP (NP (JJ stereoscopic) (NNS images)) (PP (IN of) (NP (NP (DT the) (NN surface)) (PP (IN of) (NP (NNP Mars)))))))))))))))) (. .)))
The Mars Exploration Rovers, launched by NASA in 2003 to explore the surface of Mars, are equipped with unique cameras that allow researchers to view stereoscopic images of the surface of Mars.
(ROOT (S (NP (DT The) (NNS mars) (NN rover)) (VP (VBZ is) (NP (NP (DT the) (JJ wheeled) (NN robot)) (VP (VBN developed) (PP (IN by) (NP (NN nasa))) (S (VP (TO to) (VP (VB explore) (NP (NP (DT the) (NN surface)) (PP (IN of) (NP (NNS mars)))))))))) (. .)))