Combine the given two facts to write a concluding fact. Note that there should be some parts of the first and second facts that are not mentioned in this conclusion fact. Your combined fact should be the result of a chain between the two facts. Chains form when two facts connect together to produce a concluding fact. An example of a chain is: "pesticides cause pollution" (fact1) + "pollution can harm animals" (fact2) → "pesticides can harm animals" (conclusion fact). Parts of the concluding fact overlap with the first and the second fact. To construct such a  concluding fact, a useful way is to borrow the subject from one fact and the ending conclusions from another fact.

Input: Consider Input: Fact 1: Infancy is the period of most rapid growth after birth. 
Fact 2: While a baby is very young, during infancy, co-sleeping is very convenient for feeding schedules.

Output: Very young babies have the period of most rapid growth after birth.


Input: Consider Input: Fact 1: Ethanol is produced by alcoholic fermentation of the glucose in corn or other plants. 
Fact 2: Alcohol includes ethanol and methanol.

Output: alcohol can make methanol.


Input: Consider Input: Fact 1: breathing is when a gill converts from oxygen in water into oxygen in blood. 
Fact 2: Sharks breathe using gills.


Output: sharks convert oxygen with gills.