What date field does Telligent use to sort by date?

We are trying to pull the last three answered questions from Telligent to our website. We are able to pull all questions via this call: /api.ashx/v2/search.json?Query=*&Filters=threadstatus::Answered||group::142

What field do we need to reference to pull the sort by date? We read through the API documentation https://community.telligent.com/community/10/w/api-documentation/61731/list-search-result-rest-endpoint and cannot locate the answer.