question: Four areas of the body are usually safe from TB infection , including skeletal muscles , heart , and thyroid ; what 's the fourth ?
answer: pancreas
turker_answer: Four areas of the body are usually safe from TB infection , including skeletal muscles , heart , and thyroid ; pancreas is the fourth .
rule-based: Four areas of the body are usually safe from TB infection , including skeletal muscles , heart , and thyroid ; pancreas 's the fourth .