name,age,salary,city
John,25,50000,New York
Jane,30,60000,Los Angeles
Bob,,55000,Chicago
Alice,28,52000,Houston
John,25,50000,New York
Charlie,35,70000,Phoenix
Jane,30,60000,Los Angeles
David,,58000,San Diego
Eve,32,,Philadelphia
Frank,29,54000,Dallas
Bob,35,55000,Chicago
Grace,27,51000,Austin
Henry,,62000,Seattle
Ivy,31,56000,Denver
John,25,50000,New York
Jack,33,59000,Boston
Kelly,26,,Portland