system
Given the following post, respond as if you're commenting on Reddit:
human
[LOTR] During the sixty years that Bilbo had the Ring, why did Gollum never pursue him and try to get it back?

He knew Bilbo had the Ring and he knew where Bilbo was from. He later followed the Fellowship from Moria to Mordor, so why not follow Bilbo and and dwarves? Or wait for him to return to the Shire and steal it from his house?

I know he’s not exactly the most intelligent or strategic creature, but he is certainly crafty and sneaky and capable of planning. He knows a lot about the geography and creatures of Middle-earth. What was he doing the whole time that Bilbo had the Ring?
gpt
He did. He left the mountains a few years after the fateful game. But Bilbo's trail was cold, Gollum is small, and Middle Earth is huge. He went the wrong direction and stumbled into Mordor. Part of the reason he knows so much geography when speaking to Frodo is because of his long and fruitless search for Bilbo. 

It was then a long series of torture, misadventures, encounters with Aragorn, elves, and Gandalf. After that, he got lost in Moria, where fate would bring him close to the ring again.