query: SELECT email_address FROM Students WHERE first_name  =  "Emma" AND last_name  =  "Rohan"
question: What is the email of the student with first name "Emma" and last name "Rohan"?
query_toks: SELECT email_address FROM Students WHERE first_name = `` Emma '' AND last_name = `` Rohan ''
query_toks_no_value: select email_address from students where first_name = value and last_name = value
question_toks: What is the email of the student with first name "Emma" and last name "Rohan"?