Input Tags/Elements in AMP-html

Question

we are implementing our current site in AMP version and i am new to this. I have below queries regarding AMP -

1. How to get user input from user in AMP-HTML.
2. In the above mentioned site [desktop version] we have comment section at the bottom of the page. We need to implement the same functionality in AMP.
3. Are there any websites which are build and developed in AMP? If yes, i need links to check.

Any suggestion and ideas related to above queries would be appreciated. Thanks.

Answer 1

It is still under experimental. See: https://github.com/ampproject/amphtml/blob/a2477e1790d604dbc01997b6e0a9fe42ac6fa799/extensions/amp-form/amp-form.md