Does the sentence "A very rare syndrome with isolated congenital insensitivity to pain has been linked with mutations in the SCN9A gene, which codes for a sodium channel (Nav1.7) necessary in conducting pain nerve stimuli." provide a valid answer to the question "What gene is responsible for coding for a sodium channel necessary for conducting pain nerve stimuli?"

A: yes

Does the sentence "The position is elected each year by a group of six councillors." provide a valid answer to the question "How many councillors choose the Lord Mayor?"

A: yes

Does the sentence "Maplecroft Child Labour Index 2012 survey reports 76 countries pose extreme child labour complicity risks for companies operating worldwide." provide a valid answer to the question "Was Brazil on the list?"

A: no

Does the sentence "In 1997, the mammals were comprehensively revised by Malcolm C. McKenna and Susan K. Bell, which has resulted in the McKenna/Bell classification." provide a valid answer to the question "In 1997 who revised the classification of mammals?"

A:
yes