Mei Li:
Zarathustra, also called Zoroaster, is a Persian??
Shuai Zheng:
prophet
Mei Li:
From which plant is linseed oil derived??
Shuai Zheng:
flax
Mei Li:
Presaged by a 1784 letter of Ben Franklin, what concept saw its first widespread use in 1916 as a wartime measure aimed at conserving coal??
Shuai Zheng:
daylight saving time