( ( ( The Day ) ( of ( ( the Thunderstorm ) ( When ( ( the thunderstorm ) occurred ) ) ) ) ) ( , ( it ( ( ( ( ( was mid-summer ) ( ( just ( two days ) ) ( before ( the ( summer solstice ) ) ) ) ) , ) ( with ( ( the ( Artic daylight ) ) ( lasting ( ( the ( full ( 24 hours ) ) ) ( of ( each day ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (NP (NP (DT The) (NN Day)) (PP (IN of) (NP (NP (DT the) (NNP Thunderstorm)) (SBAR (WHADVP (WRB When)) (S (NP (DT the) (NN thunderstorm)) (VP (VBD occurred))))))) (, ,) (NP (PRP it)) (VP (VBD was) (ADJP (JJ mid-summer)) (PP (NP (RB just) (CD two) (NNS days)) (IN before) (NP (DT the) (NN summer) (NN solstice))) (, ,) (PP (IN with) (NP (NP (DT the) (JJ Artic) (NN daylight)) (VP (VBG lasting) (NP (NP (DT the) (JJ full) (CD 24) (NNS hours)) (PP (IN of) (NP (DT each) (NN day)))))))) (. .)))
The Day of the Thunderstorm When the thunderstorm occurred, it was mid-summer just two days before the summer solstice, with the Artic daylight lasting the full 24 hours of each day.
(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.