Mei Li:
For what disease did Jonas Salk invent a vaccine??
Shuai Zheng:
polio
Mei Li:
Who's missing: Virgil Earp, Wyatt Earp, John Holliday?
Shuai Zheng:
morgan earp
Mei Li:
What type of creature is a peccary??
Shuai Zheng:
wild pig