en_tn/gen/19/14.md

Lot went out

This could be translated "So Lot left the house."

his sons-in-law, the men who had promised to marry his daughters

The phrase "the men who had promised to marry his daughters" explains what "sons-in-law" means here. It could also be translated as "the men who were going to marry his daughters" or "his daughters' fiancés"

Get going

"Go now"

so you are not swept away

"or else you will be swept away."

swept away

"destroyed" or "wiped out"

in the punishment of the city

This can also be translated as "when the city is punished" or "when we destroy the city" (ULB).