Temporal and Spatial Information Extraction reading group

When and where | Past papers | Planned papers | Papers for consideration | Other reading | Links


Temporal and Spatial Information Extraction is the elicitation of accurate data on the placement of events and objects in space and time from a discourse. Temporal information specifies both tense and aspect of actions, both explicitly given by text and implicit from world knowledge. Spatial expressions describe location and orientation information, and this reading group is focused on the geographical subset of such information.

Formal annotations for temporal and spatial information have been developed, including TimeML (which has a strong Sheffield background) and SpatialML, developed at MITRE. Fully annotated corpora for both TimeML and SpatialML remain thin on the ground - key contirbutions being Timebank from Brandeis, and ASC (ACE SpatialML Corpus) available from Pennsylvania's LDC (reference LDC2008T0313).

Being able to identify and annotate times and places throughout discourse enables us to build a richer representation of the knowledge present in text. Once such data has been made accessible, we can at the least build visualisation and verification tools; question answering of when, how often, how long, how far, and where questions will become easier and yield more accurate results; richer machine translation can be performed given a syntax and language independent notation for places and events; and overall, a more complete knowledge representation can be build of any discourse.

The Temporal and Spatial Information Extraction group tracks recent publications, concentrating on those aspects of Temporal and Spatial Information Extraction required for projects in the department.


When and Where


Tuesday at 2pm, fortnightly


Usually G30


3rd November 2009, 14.00


Leon Derczynski


Planned papers

If you would like a printed copy, please try the wooden shelves in G28 (opposite the G30 door) or ask Leon.


Past papers


Papers for consideration

This list is thoroughly open to additions and subtractions. If there's a paper you would like to see or present, just send Leon the details.



This is simply a skeleton list of texts that may be useful background reading, and almost certainly incomplete - please mail Leon with any ideas you might have!