Typo: underscores instead of hyphens in named entity classes/types/subtypes

[dan-zeman]

Some labels in the named entity taxonomy contain underscores. Instead, there should be hyphens as in the other labels.

Examples: social_group, international_organization, government_organization...

[jbonn]

Thank you for catching this! I'll be working on guidelines updates this week, so please don't hesitate to send me more places where you think revisions will be helpful. (julia.bonn@colorado.edu if you want to email directly)