how to play 7 Wonders Architects - Medals

About 7 Wonders: Architects – Medals, from BoardGameGeek:

7 Wonders: Architects – Medals brings new elements to the table for the 7 Wonders: Architects base game, without adding anything to the game's playing time. First, this expansion includes two new wonders - Ur and Rome - to give players more choices for what to build. Second, new science tokens exist that can be mixed with the original ones, tokens that give you the ability to, for example, keep military cards that you would normally discard or always have the cat ability available to you. Finally, this expansion includes a new game element: medals. At the start of play, draw a random medal and place it face up between each pairing of players. (Each pairing already has a card rack between it, so now two items will be present.) When either of these players meets the conditions showing on a medal, they claim the medal and turn it face down, earning 4vp for this medal at game's end.