  Multi-sentence questions (MSQs) are sequences of questions connected by
relations which, unlike sequences of standalone questions, need to be answered
as a unit. Following Rhetorical Structure Theory (RST), we recognise that
different "question discourse relations" between the subparts of MSQs reflect
different speaker intents, and consequently elicit different answering
strategies. Correctly identifying these relations is therefore a crucial step
in automatically answering MSQs. We identify five different types of MSQs in
English, and define five novel relations to describe them. We extract over
162,000 MSQs from Stack Exchange to enable future research. Finally, we
implement a high-precision baseline classifier based on surface features.
