You can find the details of Viola's presentation here:

Worlds are not denotations
The main goal of this talk is negative: I will argue that possible worlds don’t have object-language representations, as (i) readings that have been argued to require such object-language representations are more plausibly derived without them (this is based on current joint work with Ido Benbaji  and Clemens Mayr) and (ii)`ontological symmetry’ (as discussed in Schlenker 2006) breaks down when considering plurality. Beyond providing evidence for the negative claim, I...

Here is the details of Jack's work:

What Did I Tell You? Designing Surveys to Collect Cross-Linguistic Data on Speech Reports 

 In this talk, I present the main driving question behind my dissertation: in speech reports, what are the possible semantic contributions of embedded clauses, and how does the (morpho-syntactic) form of the embedded clause affect these contributions? Answering such a question requires a rigorous way of comparing the meanings of speech reports cross-linguistically. In this talk, I propose one...