CREATE TABLE table_66753 ("Name of System" CLOB, "Location" CLOB, "Traction Type" CLOB, "Date  ( From ) " CLOB, "Date  ( To ) " CLOB)

On what date did the event at Zaltbommel begin?
SELECT "Date (From)" FROM table_66753 WHERE "Location" = 'zaltbommel'
SELECT "Date (From)" FROM "table_66753" WHERE "Location" = 'zaltbommel'