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: Catecholamines are a class of amine hormones synthesised form which amino acid? Answer: tyrosine

SOLUTION: Catecholamines are a class of amine hormones that when synthesised form the amino acid tyrosine.

PROBLEM: Question: What is the most numerous species on the planet? Answer: bacteria

SOLUTION: Bacteria are the most numerous species on the planet.

PROBLEM: Question: Boron only occurs naturally in compounds with what element? Answer: oxygen

SOLUTION:
Boron only occurs naturally in compounds with oxygen element.