I have a question about how the "assignee_type" variable in the "g_assignee_disambiguated" table is defined in the data.

Specifically, the variable classifies assignees into "Company" (or "Corporation") and other types, and further divides "Companies" into "US" and "Foreign." Could you please explain how you identify whether an assignee is a company, and how you define their nationality (US or Foreign)? Is it based on the location of their headquarters?

Thank you very much!