Past talks by <span itemscope itemtype='http://schema.org/Person'><span itemprop='givenName'>Peter </span> <span itemprop="familyName">Singer </span><span itemspec itemtype='http://schema.org/Organization'><span itemprop='name'> (Princeton University)</span></span></span>

What are custom tags?

Custom tags are words that can be associated with events to classify them. Their use is optional. They are primarily meant to enable organisations to track and classify the events they submit in ways that cut across our own classification scheme.