input with options: Fact 1: Plant requires seed dispersal for reproduction.  Fact 2: Many plants depend on birds for pollination and seed dispersal.  Given the two facts above, what are plants pollinated by?
output: birds

input with options: Fact 1: Bacteria in soil convert atmospheric nitrogen into a form usable by plants.  Fact 2: Plant adds nitrogen to the soil.  Given the two facts above, what feeds plants?
output: bacteria

input with options: Fact 1: Antigens are found on cancer cells and the cells of transplanted organs.  Fact 2: Examples of animal organs are kidneys and hearts.  Given the two facts above, antigens are found on cancer cells and the cells of transplanted what?
output: kidneys

input with options: Fact 1: Freezing causes a solid to form.  Fact 2: Ice, on the other hand, is a solid.  Given the two facts above, what causes ice to form?
output:
freezing