premise: It was Chamara Silva who primarily kept the scoreboard ticking over with a 68-run stand for the fifth wicket with Mahela Jayawardene, and an unbeaten 57-run partnership with Prasanna Jaywardene.
  At the close, Silva was unbeaten on 79, his second half century of the match after failing to score in the first Test, while Jayawardene was not out 22.
  Lasith "Slinga" Malinga and Muttiah Muralitharan had earlier bowled Sri Lanka to a 138-run first innings lead.
  The New Zealand batsmen had no answer to the hostile pace and slinging action of Malinga at one end, and could not read Muralitharan's spin at the other, as they crumbled to be all out before lunch on the second day for 130.
  Of the New Zealand batsmen only Brendon McCullum put up any solid resistance. He was dropped on the first ball of the day without scoring and went on to post 43 before he was bowled by Muralitharan to end the innings.
   What led to the crumbling of New Zealand on the second day?
hypothesis: could not read Muralitharan's spin