He is the only one of the students who come from the country.这句话里定语从句的先行词是什么?

Question

He is the only one of the students who come from the country.这句话里定语从句的先行词是什么?

Answer 1

此句为病句,正确表达应为：
He is the only one of the students who comes from the country.他是学生中唯一来自农村的.（先行词为the only one)
He is one of the students who come from the country.他是来自农村的学生之一.（先行词为the students)