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1. NEER: An Unsupervised Method for
Named Entity Evolution Recognition
(Beginner Level)
Nina N. Tahmasebi, Thomas Risse
L3S Research Center
Hannover, Germany
risse@L3s.de

2. Change Period
Named Entity Evolution
Named Entities (NE): people, places, companies...
Characteristics of Named Entity Evolution (NEE)
 Same thing but different terms over time
 Change occurs over short periods of time
 Small or no concept shift
 Announced to the public repeatedly
Goal: Find method for named entity evolution
recognition independent from external
knowledge sources
Slide 2
Joseph Ratzinger Pope Benedict
Pope Benedict XVI
Benedict XVI
Joseph Aloisius Ratzinger
Cardinal Ratzinger
Cardinal Joseph Ratzinger

3. Named Entity Evolution Recognizer (NEER)
Slide 3
Filtering
Finding
Temporal
Co-references
Co-References
Benedict XVI
à Joseph Ratzinger
à Cardinal Ratzinger
1. Pope Benedict XVI
2. Pope Benedict
3. Benedict XVI
4. Cardinal Ratzinger
5. Pope
6. Benedict
Identifying
Change Periods
(Burst Detection)
Extract Text NLP Processing Context Creation
In his latest address to
American bishops visiting
Rome, Pope Benedict XVI
stressed that Catholic
educators should remain
true to the faith -- a
reminder issued just in time
for another tense season of
commencement addresses.
No, the pope did not
mention Georgetown
University by name when
discussing the Catholic
campus culture wars.
In his latest address to
American bishops visiting
Rome, Pope Benedict XVI
stressed that Catholic
educators should remain
true to the faith -- a
reminder issued just in time
for another tense season of
commencement addresses.
No, the pope did not
mention Georgetown
University by name when
discussing the Catholic
campus culture wars.
In his latest address to
American bishops visiting
Rome, Pope Benedict XVI
stressed that Catholic
educators should remain
true to the faith -- a
reminder issued just in time
for another tense season of
commencement addresses.
No, the pope did not
mention Georgetown
University by name when
discussing the Catholic
campus culture wars.
In his latest address to
American bishops visiting
Rome, Pope Benedict XVI
stressed that Catholic
educators should remain
true to the faith -- a
reminder issued just in time
for another tense season of
commencement addr-
esses. No, the pope did not
mention Georgetown
University by name when
discussing the Catholic
campus culture wars.
In his latest address to
American bishops visiting
Rome, Pope Benedict XVI
stressed that Catholic
educators should remain
true to the faith -- a
reminder issued just in time
for another tense season of
commencement addr-
esses. No, the pope did not
mention Georgetown
University by name when
discussing the Catholic
campus culture wars.
In his latest address to
American bishops visiting
Rome, Pope Benedict XVI
stressed that Catholic
educators should remain
true to the faith -- a
reminder issued just in time
for another tense season of
commencement addr-
esses. No, the pope did not
mention Georgetown
University by name when
discussing the Catholic
campus culture wars.
Barack Obama
Senator
State Senator Barack Obama
Senator-elect Barack Obama
Senator Barack Obama
Illinois Democrat
Vladimir Putin
President-elect Vladimir V Putin
Minister Vladimir Putin
Acting President Vladimir V Putin
President Vladimir V Putin
Processing Chain

4. fokas Demonstrator - results
4

5. THANK YOU
CONTACT DETAILS
Dr. Thomas Risse
+49 511 762 17764
risse@L3S.de
www.arcomem.eu