"This image released by PBS shows ""Sesame Street"" characters Murray Monster, left, and Count von Count, right, with actor Benedict Cumberbatch during the taping of a video for posted Tuesday, Feb. 4, 2014, on PBS' YouTube channel. With the help of Count and Murray, Cumberbatch explains how to count up four apples and three oranges, and which is the greater number. (AP Photo/PBS)"
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