Some bitcoin addresses on blockchain.info refer to an external website, see e.g. here:
https://blockchain.info/tx/40c09e1fb345d258b8123c5e6ceda3d53575def3053c87bf7d5571c74fc2227d
One of the addresses in this transaction is:
https://blockchain.info/address/1bonesNcbrNbHJZr33LV2gBmDS9m91TWz
This blockchain.info page shows the address as English text instead of a Base58 encoded string.
How does this work?