It should be possible to mention any nostr event starting mentions with @ npub/nprofile/note/nevent/naddr

nostr:nevent1qqs0kvq3d3grprp2czt2mpceprfy4svejzfeyz23ejyx8c2srpayu2cn78ts5

nostr:npub1qny3tkh0acurzla8x3zy4nhrjz5zd8l9sy9jys09umwng00manysew95gx

nostr:nprofile1qqsqfjg4mth7uwp307nng3z2em3ep2pxnljczzezg8j7dhf58ha7ejgeyqy52

nostr:note1lvcpzmzsxzxz4syk4kr3jzxjftqenyynjgy4rnygv0s4qxr6fc4sl4kkcf

nostr:naddr1qqyxvepkv33nxdmrqyvhwumn8ghj7un9d3shjtnndehhyapwwdhkx6tpdshszrnhwden5te0dehhxtnvdakz7qg3waehxw309ahx7um5wgh8w6twv5hsz9mhwden5te0wfjkccte9ehx7um5wghxyctwvshsygpm7rrrljungc6q0tuh5hj7ue863q73qlheu4vywtzwhx42a7j9n5psgqqqw4rsjpg6fz