If you are on Facebook app,
look for  Open with ...
and tap Know and Tell.

Otherwise, look for  Share via ...
and tap Know and Tell.

If you haven't downloaded Know and Tell,
please tap  GET  below.

If you are on Facebook app, G+ app,
or Facebook Messenger app,
look for  Open in Safari
and tap it.

Or, look for  Copy Link
and paste it into Safari.