question: What was one of the main concerns of this literature on how schooling and earnings ?
answer: not achieve their full academic potential , due to financial difficulties
turker_answer: One of the main concerns of this literature on schooling and earnings were that they would not achieve their full academic potential due to financial difficulties .
rule-based: One of the main concerns of this literature on how schooling and earnings was not achieve their full academic potential , due to financial difficulties .