Table: netherlands_trams
Columns: name_of_system
location
traction_type
date_from
date_to
notes

Question: what is the date (from) where date (to) is 1919?
SQL: SELECT "date_from" FROM netherlands_trams WHERE "date_to" = '1919'

Question: how many times is the date (to) 1919?
SQL: SELECT COUNT("notes") FROM netherlands_trams WHERE "date_to" = '1919'

Question: what is the date (from) where the notes are apeldoornsche tramweg-maatschappij?
SQL: SELECT "date_from" FROM netherlands_trams WHERE "notes" = 'Apeldoornsche Tramweg-Maatschappij'

Question: how many notes are form the date (from) 14 march 1910?
SQL: SELECT COUNT("notes") FROM netherlands_trams WHERE "date_from" = '14 March 1910'

Question: what is the location for the date (to) 8 october 1922?
SQL: SELECT "location" FROM netherlands_trams WHERE "date_to" = '8 October 1922'

Question: what are the notes for date (from) 12 august 1897?
SQL: SELECT "notes" FROM netherlands_trams WHERE "date_from" = '12 August 1897'