Given a statement and question, generate the answer to the question such that the answer is contained in the statement.

statement: Therian mammals give birth to indepnedent babies, called live birth., question: What are indepnedent babies called?
live birth

statement: weather refers to the conditions in the layer of gasses that encases the earth, question: What refers to the conditions in the layer of gasses that encases the earth?
weather

statement: changing the direction of force applied can make lifting metal easier, question: What can change the direction of force applied make?
lifting metal