which, where, in which

[KSSEEJ]

"On the other hand, for the sport centers which their demands are slightly over, the government could lift their capacity by upgrading their facilities"

Could "which" be substituted by "where" or "in which" in the sentence?

[Gillnetter]

"On the other hand, for the sport centers which their demands are slightly over, the government could lift their capacity by upgrading their facilities"

Could "which" be substituted by "where" or "in which" in the sentence?

I'm unsure of what the sentence means. What does "slightly over" mean here? Also, by "lift their capacity" do you mean increase the number of seats?

[emsr2d2]

"On the other hand, for the sport centers which their demands are slightly over, the government could lift their capacity by upgrading their facilities"

Could "which" be substituted by "where" or "in which" in the sentence?

The part I have marked in red doesn't make sense at the moment. I will take a guess at what is meant:

On the other hand, for/regarding the sports centres whose demands are slightly higher, the government could increase their capacity by upgrading their facilities.

Is that close to what you meant? I have assumed that the demands are demands for more seats.