Complex sentence: Crown Media Holdings and The Jim Henson Company bought majority stakes in Odyssey in November 1998; under the new venture, Odyssey underwent a major programming revamp on April 4,1999, decreasing the amount of religious programs on the network down to four hours a day.
Split into simpler sentences: Crown Media Holdings and The Jim Henson Company bought majority stakes in Odyssey in November 1998. The Hallmark/Henson version of Odyssey launched on April 4,1999, and the airing of religious programs went down to four hours a day.