TASK DEFINITION: In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.
PROBLEM: Question: What happens when forces of evolution work over a long period of time? Answer: macroevolution

SOLUTION: Macroevolution happens when forces of evolution work over a long period of time.

PROBLEM: Question: What is the most common type of cancer developed in children? Answer: leukemia

SOLUTION: Leukemia is the most common type of cancer developed in children.

PROBLEM: Question: What is first year after birth is called? Answer: infancy

SOLUTION:
The first year after birth is called infancy.