Today couples who are nostalgic for the more romantic days of Gretna Green's past still come to The Old Blacksmith's Shop to exchange their vows, though they now participate in a legal marriage ceremony.
Those who come at The Old Blacksmith's Shop are already married legally.
mnli hypothesis: Those who come at The Old Blacksmith's Shop are already married legally. premise: Today couples who are nostalgic for the more romantic days of Gretna Green's past still come to The Old Blacksmith's Shop to exchange their vows, though they now participate in a legal marriage ceremony.