question: What is the library programmers use to solve object-relational impedance mismatch ?
answer: object-relational mappings ( ORMs )
turker_answer: The library programmers use to solve object-relational impedance mismatch is object-relational mappings ( ORMs ) .
rule-based: The library programmers is use object-relational mappings ( ORMs to solve object-relational impedance mismatch .