user: Question: What Occupation has the Rank of 5th and has a Candidate's Name of Henry Zekveld?
Columns: ['Riding', "Candidate's Name", 'Gender', 'Residence', 'Occupation', 'Votes', 'Rank']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Ajax—Pickering', 'Kevin P. Norng', 'M', 'Claremont', 'Contractor', 398.0, '5th']
SQL:

assistant: SELECT "Occupation" FROM "Table" WHERE "Rank" = '5th' AND "Candidate's Name" = 'Henry Zekveld';