Filtering the joined dataset

There are six columns in the descriptions dataset (and therefore in the new joined dataset) that describe the topic of a resolution:

1. me: Palestinian conflict
2. nu: Nuclear weapons and nuclear material
3. di: Arms control and disarmament
4. hr: Human rights
5. co: Colonialism
6. ec: Economic development

Each contains a 1 if the resolution is related to this topic and a 0 otherwise.