{"format"=>"structured", "physdesc_components"=>[{"name"=>"extent", "value"=>"14 boxes", "unit"=>"containers"}, {"name"=>"extent", "value"=>"6.42 linear feet", "unit"=>"linear_feet"}]}
{"format"=>"structured", "physdesc_components"=>[{"name"=>"extent", "value"=>"150 computer files", "unit"=>"computer_files"}, {"name"=>"extent", "value"=>"2.8 megabytes", "unit"=>"megabytes"}]}
{"format"=>"structured", "physdesc_components"=>[{"name"=>"extent", "value"=>"2 audio recordings", "unit"=>"audio_recordings"}]}