Challenge: a tweet's locations do not always indicate spatial information involving the author of the tweet . a corpus of 1,062 tweets contains 1,200 location named entities .
Approach: They propose a corpus annotating whether tweet authors are located in locations . they use temporal tags centered around tweet timestamps to temporally anchor this information .
Outcome: The proposed method annotates whether authors are located in tweet locations . it shows that no spatial relationship can be inferred in 21% of instances .

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Challenge: Experimental results show that a neural architecture that combines both modalities yields better results.
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Annotating Temporally-Anchored Spatial Knowledge by Leveraging Syntactic Dependencies (L18-1)

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Challenge: Existing approaches to extract spatial knowledge focus on extracting locations of events, someone or something.
Approach: They propose a method to annotate temporally-anchored spatial knowledge on top of OntoNotes by crowdsourcing annotations.
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Identification of Fine-Grained Location Mentions in Crisis Tweets (2022.lrec-1)

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Challenge: Recent studies have focused on identifying informative tweets by individuals affected by a crisis, without considering their specific types.
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Geo-Seq2seq: Twitter User Geolocation on Noisy Data through Sequence to Sequence Learning (2023.findings-acl)

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Challenge: a new method for Twitter user geolocation rewrites noisy, multilingual location strings into structured English location names.
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Tagging Location Phrases in Text (2020.lrec-1)

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Challenge: a number of studies have focused on detecting named entities in written language.
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Exploring Author Context for Detecting Intended vs Perceived Sarcasm (P19-1)

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Challenge: Existing studies on textual sarcasm detection use manual labelling and tag-based distant supervision to detect sarcasm.
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Annotations for Exploring Food Tweets from Multiple Aspects (2024.lrec-main)

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Challenge: The Latvian Twitter Eater Corpus (LTEC) is a collection of tweets gathered by following the appearance of 363 keywords related to food, drinks, eating and drinking in various valid word forms in the Latvian language.
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Temporally-Informed Analysis of Named Entity Recognition (2020.acl-main)

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Challenge: Existing methods to evaluate text data are rarely reported by taking the timestamp of the document into account.
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NarrativeTime: Dense Temporal Annotation on a Timeline (2024.lrec-main)

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Challenge: e.g. TimeBank contains 1-5% of all possible tlinks, and this information is underspecified in the text.
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Who Wrote When? Author Diarization in Social Media Discussions (2024.findings-emnlp)

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Challenge: Existing approaches for author diarization are unable to detect stylistic shifts in a text .
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