❤️‍🩹 Sensai: Toxic Chat Dataset

Sensai is a toxic chat dataset consists of live chats from Virtual YouTubers' live streams.

Download the dataset from Kaggle Datasets and join #livechat-dataset channel on holodata Discord for discussions.

Provenance

• Source: YouTube Live Chat events (all streams covered by Holodex, including Hololive, Nijisanji, 774inc, etc)
• Temporal Coverage: From 2021-01-15T05:15:33Z
• Update Frequency: At least once per month

Research Ideas

• Toxic Chat Classification
• Spam Detection
• Sentence Transformer for Live Chats

See public notebooks for ideas.

Files

filename	summary	size
chats_flagged_%Y-%m.csv	Chats flagged as either deleted or banned by mods (3,100,000+)	~ 400 MB
chats_nonflag_%Y-%m.csv	Non-flagged chats (3,100,000+)	~ 300 MB

To make it a balanced dataset, the number of chats_nonflags is adjusted (randomly sampled) to be the same as chats_flagged. Ban and deletion are equivalent to markChatItemsByAuthorAsDeletedAction and markChatItemAsDeletedAction respectively.

Dataset Breakdown

Chats (chats_%Y-%m.csv)

column	type	description
body	string	chat message
membership	string	membership status
authorChannelId	string	anonymized author channel id
channelId	string	source channel id

Membership status

value	duration
unknown	Indistinguishable
non-member	0
less than 1 month	< 1 month
1 month	>= 1 month, < 2 months
2 months	>= 2 months, < 6 months
6 months	>= 6 months, < 12 months
1 year	>= 12 months, < 24 months
2 years	>= 24 months

Pandas usage

Set keep_default_na to False and na_values to '' in read_csv. Otherwise, chat message like NA would incorrectly be treated as NaN value.

import pandas as pd
from glob import iglob

flagged = pd.concat([
    pd.read_csv(f,
                na_values='',
                keep_default_na=False)
    for f in iglob('../input/sensai/chats_flagged_*.csv')
],
               ignore_index=True)

Consideration

Anonymization

authorChannelId are anonymized by SHA-1 hashing algorithm with a pinch of undisclosed salt.

Handling Custom Emojis

All custom emojis are replaced with a Unicode replacement character U+FFFD.

Citation

@misc{sensai-dataset,
 author={Yasuaki Uechi},
 title={Sensai: Toxic Chat Dataset},
 year={2021},
 month={8},
 version={31},
 url={https://github.com/holodata/sensai-dataset}
}

License

• Code: MIT License
• Dataset: ODC Public Domain Dedication and Licence (PDDL)