Sentence:  Alonso's second place moves him into a tie on points at the head of the championship with Sebastian Vettel, who was sixth in his Red Bull, passing Button, then Hamilton and finally Mercedes driver Nico Rosberg in quick succession in the closing <WSD>laps</WSD>. 
Meaning of the word marked with <WSD> tags:  One circuit around a race track, or one traversal down and then back the length of a pool