Task: Wrong Candidate Generation
Input (English): Context: So now i m learning bass . it 's been almost 2 months learning . : hyper : but before i got my bass i signed up for beggining guitard elective in h.s . because my sister has a fender ( even though she ca n't play ) so i decided i 'll play guitard if my parents do nt buy me a bass . 
Question: What may be the reason why they signed up for guitar before they got a bass ? 
Correct Answer: They had wanted a guitar .
Output (English): They thought they bought a guitar but it was a bass .