how do I follow who has responded to a topic post

@keljad (69)
Australia
October 13, 2006 6:51am CST
How do I follow who if any one has responded to a topic post where do I click to follow a discussion.
2 responses
bayboy
@bayboy (986)
• United States
23 Oct 06
Um oh... ok..
binod___gharami
@binod___gharami (1065)
• India
23 Oct 06
yes