Title: Alfred North Whitehead.
Question: What founder of pragmatism's collected papers did Charles Hartshorne ans Paul Weiss edit?

Title: Portugal.
Question: Between 1974 and 2010, how did the Portuguese government encourage over-expenditure and investment bubbles?

Title: Mexico City.
Question: What is the bus system called in Mexico City?

Title: Wood.
Question:
What do conifers use rosin to protect themselves from?