In this task, you are given a sentence and a question, you would be asked to create the answer which is contained in the sentence provided.

Sentence: Test wells are drilled to monitor groundwater pollution. Question: What are drilled to monitor groundwater pollution?
test wells

Sentence: Backbone is another name for the vertebral column. Question: What is another name for the vertebral column?
backbone

Sentence: Filter feeders called rotifers collect digestive and excretory wastes in cloacal bladder primitive organ. Question: Filter feeders called rotifers collect digestive and excretory wastes in what primitive organ?

cloacal bladder