Question: Have Douglas fir been used to fight wars?
Answer: Douglas fir are a type of tree. Douglas fir are used to make ships. The Minesweeper is a small warship made from Douglas fir. The Minesweeper was made of wood to reduce it's risk magnetic signature and likely hood of detonating mines.. The answer is: yes.

Question: Does Disney have an ice princess?
Answer: In 2013, Disney released Frozen. Frozen features Elsa, a princess with magical ice powers.. The answer is: yes.

Question: Does Bombyx mori have a monopoly over silk production?
Answer:
A monopoly refers to the exclusive supply of a good. The Bombyx mori is a moth famous for its silk production. Spiders, beetles, caterpillars, and fleas produce silk. Wild silk produced by caterpillars has been used in China, Europe, and South Asia since antiquity.. The answer is: no.