What are the distinct first names for students with a grade point of 3.8 or above in at least one course?
SELECT DISTINCT T3.Fname FROM ENROLLED_IN AS T1 JOIN GRADECONVERSION AS T2 JOIN STUDENT AS T3 ON T1.Grade  =  T2.lettergrade AND T1.StuID  =  T3.StuID WHERE T2.gradepoint  >=  3.8
SELECT DISTINCT T3.Fname FROM ENROLLED_IN AS T1 JOIN GRADECONVERSION AS T2 JOIN STUDENT AS T3 ON T1.Grade  =  T2.lettergrade AND T1.StuID  =  T3.StuID WHERE T2.gradepoint  >=  3.8
[{'Fname': 'Linda'}, {'Fname': 'Tracy'}, {'Fname': 'Dinesh'}, {'Fname': 'Paul'}, {'Fname': 'Andy'}, {'Fname': 'Lisa'}, {'Fname': 'Jandy'}, {'Fname': 'Eric'}, {'Fname': 'Derek'}, {'Fname': 'David'}, {'Fname': 'Steven'}, {'Fname': 'Charles'}, {'Fname': 'Susan'}, {'Fname': 'Mark'}, {'Fname': 'Bruce'}, {'Fname': 'Michael'}, {'Fname': 'Arthur'}, {'Fname': 'Ian'}, {'Fname': 'George'}, {'Fname': 'Stacy'}, {'Fname': 'Jun'}, {'Fname': 'Sarah'}, {'Fname': 'William'}]