input with options: Fact 1: Amphibians are the first true tetrapods, or vertebrates with four limbs. Fact 2: Bullfrogs eat other amphibians. Given the two facts above, these belong to the class of creature that were the first true tetrapods:?
OPTIONS:
- millipede
- crabs
- four limbs
- bullfrogs
- gastropod
- a fish
- warm-blooded
- insects
output: bullfrogs

input with options: Fact 1: Antigens are found on cancer cells and the cells of transplanted organs. Fact 2: Antigens are proteins foreign to the body. Given the two facts above, proteins foreign to the body can be found where?
OPTIONS:
- in the lymph nodes
- in nerve cells
- in the kidneys
- on cancer cells
- critical organs
- mouth of rivers
- Earth orbiting the Sun
- the skin
output: on cancer cells

input with options: Fact 1: Completing a circuit causes electricity to flow through that circuit. Fact 2: An electrical current is a flow of electrons. Given the two facts above, completing a circuit causes _ to flow through that circuit?
OPTIONS:
- heat energy
- pulse
- heat
- photons
- complete
- energy
- Heart rate
- electrons
output: electrons

input with options: Fact 1: Some viruses have an envelope of phospholipids and proteins. Fact 2: Proteins are sometimes coats of a virus. Given the two facts above, what do some viruses have a coating of?
OPTIONS:
- chromosomes
- calories
- aqueous solution
- bioaerosols
- acetic acid
- phospholipids
- DNA
- a cuticle
output:
phospholipids