( ( Which letter ) ( best ( marks ( ( the position ) ( of ( the ( ( ( Sun ( on ( ( the day ) ( with ( ( the ( greatest number ) ) ( of ( ( daylight hours ) ( for ( ( an observer ) ( in ( Eugene ( , OR ) ) ) ) ) ) ) ) ) ) ) ) ( -LRB- ( latitude ( ( ( 45 o ) North ) -RRB- ) ) ) ) a. ) ) ) ) ) ) )
(ROOT (SBARQ (WHNP (WDT Which) (NN letter)) (SQ (VP (ADVP (RBS best)) (VBZ marks) (NP (NP (DT the) (NN position)) (PP (IN of) (NP (DT the) (ADJP (ADJP (ADJP (NNP Sun)) (PP (IN on) (NP (NP (DT the) (NN day)) (PP (IN with) (NP (NP (DT the) (JJS greatest) (NN number)) (PP (IN of) (NP (NP (NN daylight) (NNS hours)) (PP (IN for) (NP (NP (DT an) (NN observer)) (PP (IN in) (NP (NNP Eugene) (, ,) (NNP OR)))))))))))) (PRN (-LRB- -LRB-) (ADVP (RB latitude)) (ADJP (NP (CD 45) (NNS o)) (JJ North)) (-RRB- -RRB-))) (NN a.))))))))
Which letter best marks the position of the Sun on the day with the greatest number of daylight hours for an observer in Eugene, OR (latitude 45 o North) a.
(ROOT (S (NP (NP (DT The) (NN number)) (PP (IN of) (NP (NP (NN daylight) (NNS hours)) (NP (DT each) (NN day))))) (VP (MD would) (VP (VB be) (ADJP (ADJP (JJS greatest)) (PP (IN during) (NP (NP (DT the) (NN summer)) (PP (IN near) (NP (DT the) (NN north) (NN pole)))))))) (. .)))
The number of daylight hours each day would be greatest during the summer near the north pole.