The original spelling reform of 1996, which was meant to harmonize the spelling rules across the German-speaking countries, turned out to be a major embarrassment if not outright failure.
The spelling reform of 1996 was the first reform. 
I think context fooled the system. The word original spelling reform implies the reform was followed by another one, so the statement is correct. 
( z1 reform :ord ( z2 ordinal-entity :value 1 ) :domain ( z3 reform :ARG1 ( z4 spell ) :time ( z5 date-entity :year 1996 ) ) )