Create the following occupation sets. You will need three different occupations from three different categories 3 times to obtain the golden crown.

Medical Professional: Doctor, Nurse, Dentist
Law Enforcement / Emergency Response: Fireman, Cop
Education Profession: Teacher, Professor, Student
Urbanization Professional: Engineer, Grave Digger
Political Professional: Lawyer, Judge
Commercial Professional: Businessman
Science and Technology: Astronaut, Geologist, Astronomer
Entertainment: Guide (Person)
Agriculture Professional: Baker, Farmer
Military: Soldier

Scribblenauts Remix 5-2 Cheats Hints gallery:
5-2-1-a: Recruit different professionals to take to the colonization of Mars.
5-2-1-b: Each professional should be from a different field.
5-2-1-c: Fields include: Military, political, education, urbanization, agriculture, and science.