A lore is an opportunity for players to ask gamemasters questions about ongoing plots to get more detailed information than can be relayed during play. They can also be used to collaborate with the GM's to build more detailed information about the world.
Abilities or items that grant lores do so after a player attends an event and need to be used immediately in the week after the event. Lores are due by the Sunday following each event so that the game masters have time to prepare them.
If you NPC all shifts of an event you may still get lore responses for one PC.
For more information on lores see
this document.