De or het kennisvergaring?

The correct Dutch article is:

de kennisvergaring

Rule Words ending in -ing: almost always de. See the rule

How to use kennisvergaring

the kennisvergaringde kennisvergaring
this kennisvergaringdeze kennisvergaring
that kennisvergaringdie kennisvergaring
our kennisvergaringonze kennisvergaring
your kennisvergaringjouw kennisvergaring
every kennisvergaringelke kennisvergaring
which kennisvergaring?welke kennisvergaring?
a big kennisvergaring / the big kennisvergaringeen grote kennisvergaring, de grote kennisvergaring