3. The method of claim 1 , comprising: receiving a reference document representation of a reference document and reference features of the reference document; and determining a document/topic distribution prediction for the reference document based upon processing the reference document representation and the reference features using the topic model, the document/topic distribution prediction specifying a probability of a second word within the reference document stemming from a third topic.
3. The method of claim 1 , comprising: receiving a reference document representation of a reference document and reference features of the reference document; and determining a document/topic distribution prediction for the reference document based upon processing the reference document representation and the reference features using the topic model, the document/topic distribution prediction specifying a probability of a second word within the reference document stemming from a third topic. 4. The method of claim 3 , comprising: specifying an input document as comprising similar topics as the reference document.