Find the third largest city in Canada.
The third largest city in Canada by population is Vancouver, British Columbia, with a population of approximately 647,540 people (according to the census in 2016 by Statistics Canada).
Complete the following task based on the instruction and optional input provided.### Instruction:
Find the third largest city in Canada.

### Output:
The third largest city in Canada by population is Vancouver, British Columbia, with a population of approximately 647,540 people (according to the census in 2016 by Statistics Canada).