Mei Li:
Sterlet, Ossetra, Sevruga and Beluga are main types of what??
Shuai Zheng:
caviar
Mei Li:
Which country was the first to make catalytic converters compulsory??
Shuai Zheng:
switzerland
Mei Li:
Grenache is a variety of which fruit??
Shuai Zheng:
grape