Find the first name of students who is older than 20.
SELECT fname FROM student WHERE age  >  20
SELECT fname FROM student WHERE age  >  20
[{'Fname': 'Shiela'}, {'Fname': 'Paul'}, {'Fname': 'David'}, {'Fname': 'Bruce'}, {'Fname': 'Ian'}, {'Fname': 'Lisa'}, {'Fname': 'Sarah'}]