Complex sentence: Sir William Edward Parry (19 December 1790--8 or 9 July 1855) was an English rear-admiral and Arctic explorer, who in 1827 attempted one of the earliest expeditions to the North Pole.
Split into simpler sentences: Sir William Edward Parry (19 December 1790--8 or 9 July 1855) was an English rear-admiral and Arctic explorer. In 1827 he attempted one of the earliest expeditions to the North Pole.