Labels:text | screenshot | font | yellow | colorfulness | rectangle OCR: PERSON Marriage SSN Marriage Id First Name (AK1) married to/spouse of Female SSN (FK)(AK1) Last Name (AK1) married to/spouse of Male SSN (FK) (AK2) Birth Date (AK1) Start Date (AK1, AK2) Gender End Date Religion Figure 7 : Two unique keys, one for the male and one tor the temale. to constrain getting married twice on the same day.