Forum posts, comments and threaded replies, with subreddit and parent relationships for topic and content filtering.

English STEM and general-subject questions, answers and explanations with formulas, images and multiple answer structures for educational Q&A evaluation.

Questions with grade, subject, answer lists, best answers and image information, selectable by educational stage and subject.

GLB models with descriptive metadata across characters, animals, architecture and vehicles, selectable by category and geometry complexity.

Images, short descriptions, tags, resolution and EXIF metadata across landscapes, people and everyday scenes.

English podcast recordings with title, description, language and duration metadata for long-form speech understanding and retrieval.

Programming questions, code snippets and discussions, scoped by technology, tags and question type.

Study cards containing questions, definitions, options and answers with subject labels, for bidirectional Q&A and card retrieval tasks.

Human-narrated English audiobooks with work, author, narrator and genre metadata for long-form speech and narrative evaluation.

Chinese text-only primary, middle and high-school questions, options and answers across subjects; some records include explanations.

English questions, multiple solution steps and final answers. Supplied question and step screenshots support evaluation of solution processes.

Audio/video and metadata organized around selected videos, channels or dataset lists, configurable by quality, duration and topic.

Podcast programs and playlists in video or audio form, selectable by channel, keywords and language.

Technology, startup and AI discussions with post-to-comment relationships for retrieval and conversation research.

ASMR audio and descriptive metadata for studies of timbre, acoustic effects and environmental sound.

Multidisciplinary international journal literature with DOI, author, journal and year metadata for bibliographic and document tasks.

Science, technology and medicine journal literature, book chapters and bibliographic metadata, scoped by subject, journal, year and DOI.

Biomedical and interdisciplinary literature with bibliographic metadata, selectable by DOI, journal and publication year.

Overseas university thesis PDFs with university, degree, language and year metadata for long-document retrieval and academic research.

Chinese medical journal literature with title, author, DOI, journal, year and MD5 metadata for retrieval and knowledge organization.

Nature literature and bibliography organization, scoped by research field, publication year and document identifiers.