Does the sentence "Hoping to build an entertainment empire around Universal, Seagram bought PolyGram in 1999 and other entertainment properties, but the fluctuating profits characteristic of Hollywood were no substitute for the reliable income stream gained from the previously held shares in DuPont." provide a valid answer to the question "What percentage of MCA/Universal did Matsushita Electric sell five years after acquiring the company?"

A: no

Does the sentence "If the heat from a HP-LED is not removed, the device will fail in seconds." provide a valid answer to the question "Why must High-power LEDs be mounted on a heat sink?"

A: no

Does the sentence "Greek drama exemplifies the earliest form of drama of which we have substantial knowledge." provide a valid answer to the question "Tragedy was a dramatic style that evolved from what?"

A: no

Does the sentence "The armed forces offered the only opportunity for upward social mobility for underprivileged Libyans, and Gaddafi recognised it as a potential instrument of political change." provide a valid answer to the question "What rationale did Gaddafi use for joining the military?"

A:
yes