TAC 2016 Tracks
Cold Start SF/KB
TAC 2016 Workshop
TAC 2016 Cold Start KBP Track
The Cold Start KBP track builds a knowledge base from scratch using a given document collection and a predefined schema for the entities and relations that will compose the KB. The current Cold Start schema consists of five entity types (PER, ORG, GPE, LOC, FAC) and binary relation types corresponding to KBP slots (and their inverse slots).
In addition to end-to-end KB construction, KBP 2016 offers two diagnostic tasks: Entity Discovery and Linking (EDL) and Cold Start Slot Filling (SF). The EDL task is to extract names and nominal mentions of specific individual PER, ORG, GPE, LOC, and FAC entities mentioned in the Cold Start document collection, and to link each mention to its KB node (either a node in the TAC reference KB, or a newly created NIL node if it doesn't have a corresponding KB entry). The Cold Start slot filling task is to search the same document collection to fill in values for specific slots for specific entities.
In 2016, EDL and Cold Start SF/KB systems will operate on the same source corpus of approximately 90K English, Chinese, and Spanish documents consisting of newswire and discussion forum posts. In order to enable slot filling teams to also participate in the full KB construction task, two EDL evaluation windows will be offered and staged so that teams attempting to construct a KB will be given the output of EDL systems participating in the first EDL evaluation window.
The Cold Start KBP track evaluates systems along two dimensions:
EDL as a standalone task is organized under the Entity Discovery and Linking Track, and is described fully on the EDL 2016 home page. Below, we focus on the relationship between EDL and Cold Start SF/KB Construction.
Given a collection of documents, the Cold Start KB Construction system must find all names or nominal mentions of specific, individual PER, ORG, GPE, LOC, and FAC entities in the collection, create a KB node for each entity, and link each name/nominal mention to the correct entity node in the KB. All Cold Start relations that are attested in the document collection must be included in the KB, along with a confidence value and provenance consisting of document(s) and offsets for the subject, predicate, and object of the relation. For relations whose objects are themselves Cold Start PER, ORG, or GPE entities (such as per:siblings or org:subsidiaries), systems must link to the KB node representing the correct entity; relations whose objects are strings (such as per:title or org:website) will use strings to represent the object. If a KB includes multiple instances of the same subject-predicate-object triple (but with different provenance information), the triple with the highest confidence value will be evaluated, and additional triples with lower confidence value may be evaluated as resources permit.
Systems partipating in the Cold Start KB Construction task are evaluated on two dimensions: slot-filling, and entity discovery and linking.
The Cold Start Slot Filling (SF) task removes the requirement that an entire text collection must be processed. Instead, Cold Start SF participants will receive the evaluation queries, and need only produce those entities and relations that would be found by the queries. A TAC slot filling system can easily be applied to this task by running initially from each evaluation query entry point, then recursively applying the system to the identified slot fillers.
The 2016 Cold Start SF/KB Construction tasks are identical to the 2015 tasks, with the following changes:
Track CoordinatorsHoa Dang (National Institute of Standards and Technology, firstname.lastname@example.org)
Shahzad Rajput (National Institute of Standards and Technology, email@example.com)
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Last updated: Tuesday, 28-Mar-2017 11:22:19 EDT
Comments to: firstname.lastname@example.org