Why comments on so contains the answer's ID

When you want to share any so comment you grab its link, eg.

https://rpg.stackexchange.com/questions/165696/if-my-character-exchanges-a-crossbow-for-a-longbow-how-do-my-attack-and-damage#comment440364_165696

At the end you can see: 440438_165697 which is comment's id and answer's id. What is the reason of storing answer's id there? You could easly locate that element on page without having answer's id attached.