{"dataset":{"name":"ACS5 Period of Entry by Nativity and Citizenship Status in Puerto Rico","slug":"acs5-b05005pr"},"field":"entry_period","members":["Entered 1980 to 1989","Entered 1990 to 1999","Entered 2000 or later","Entered 2000 to 2009","Entered 2010 or later","Entered before 1980","Entered before 1990",null]}