- unitid
-
{"value"=>"554237", "type"=>"local_mss"}
- unitdate
-
{"value"=>"1889", "type"=>"inclusive", "normal"=>"1889"}
{"value"=>"1968", "type"=>"inclusive", "normal"=>"1968"}
- unittitle
-
{"value"=>"Metropolitan Opera Company"}
- container
-
{"type"=>"box", "value"=>"13"}
{"type"=>"folder", "value"=>"3"}
- date_start
-
1889
- keydate
-
1889
- date_end
-
1968
- date_inclusive_start
-
1889
- date_inclusive_end
-
1968