Generate a sentence that answers this question: "The best time to have an all-day BBQ in the northern hemisphere is".

Answer: the amount of daylight is greatest on the summer solstice

Generate a sentence that answers this question: "To explore the regions of a super nova you will need".

Answer: detailed observation of celestial objects requires a telescope

Generate a sentence that answers this question: "A blue colored item will only reflect".

Answer:
if an object is blue then that object reflects only blue light