According to the news, how many pilot whales eventually died before they were rescued?

More than 50 pilot whales beached themselves on a stretch of Cape Cod sand Monday and some of them died before vacationers and other volunteers could push the animals back out to deeper water in a feverish rescue effort.  Hundreds of vacationers lined a quarter-mile of Chapin Beach and watched as rescuers tended to the small, glistening black whales, first discovered stranded about 6 a.m. One of the whales was dead when rescuers arrived. Seven others died after spending hours in the hot sun. Their bodies were taken away in a dump truck while volunteers poured buckets of water over to keep them moist. The rising tide at midday helped volunteers push the remaining 46 whales into water deep enough for the animals to swim on their own.