Complex sentence: Oklahoma would end the first quarter up 21--0 after the defense sacked the Idaho State quarterback forcing a fumble which was returned for a touchdown and another 51-yard touchdown pass from Jones to Broyles.
Split into simpler sentences: Oklahoma would end the first quarter up 21--0 after the OU defense sacked the Idaho State quarterback, forcing a fumble, which was returned for a touchdown. Soon cam another 51-yard touchdown pass from Jones to Broyles.