Title: Molotov%E2%80%93Ribbentrop Pact.
Question: Who did the Soviet Union agree to remain neutral with when they signed a treaty on the 13th of April?

Title: Alfred North Whitehead.
Question: How did Whitehead define the "fallacy of misplaced concreteness"?

Title: Oklahoma.
Question: What types of birds does Oklahoma have a lot of?

Title: Financial crisis of 2007%E2%80%9308.
Question:
Who commented that the super-boom got out of hand when products became so complicated that risk could not be accurately calculated?