Extract the name of the city from the sentence.
I used to live in Colombo, Sri Lanka.
The name of the city mentioned in the sentence is "Colombo".
Complete the following task based on the instruction and optional input provided.### Instruction:
Extract the name of the city from the sentence.

### Input:
I used to live in Colombo, Sri Lanka.

### Output:
The name of the city mentioned in the sentence is "Colombo".