If the number of Twitter followers is greater than or equal to 300,000 at measurement time (May 1, 2019, @ 12:00 AM PST), then this market will resolve as "YES". Otherwise, it will resolve as "NO."
Note that the resolution source is Twitter handle @AndrewYang, and that the resolution source WILL NOT CHANGE if Andrew Yang changes his handle. (E.g. If Andrew Yang abandons this handle (handle 1) and migrates to a new handle (handle 2), this market will resolve based on the follower count of handle 1.