Where do the Vimeo-90K, Flickr2K and OST images come from according to their own authors, and which third-party terms might therefore sit underneath them?

Vimeo-90K: 89,800 clips cut from videos downloaded from vimeo.com (project page); the README says 5,846 selected videos, a subset of the AoT dataset. Flickr2K: collected by the EDSR authors with the Flickr API. OST: images from search-engine queries by category with ImageNet images as backgrounds, per the SFTGAN paper. In each case the authors' pages state origin, not the terms of the underlying source; those terms (Vimeo, Flickr, search-engine results, ImageNet) were not examined in this batch. Curator qualifications: All excerpts located; image origins (Vimeo, Flickr, OST) and third-party rights implications. Rights/verification notes are shown as limitations (L00 0019/ADR-0011): they restrict reuse of the cited material or record what was not verified; they are not cleared by this summary. Limitations: [component_reuse_restriction] Third-party image rights unresolved. Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

{
  "citations": [
    {
      "url": "http://toflow.csail.mit.edu/",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://github.com/anchen1011/toflow/blob/941eae530199e646118cc5ec36b4a8896ebeb24b/README.md",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://github.com/limbee/NTIRE2017/blob/db34606c2844e89317aac8728a2de562ef1f8aba/README.md",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://arxiv.org/abs/1804.02815v1",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://github.com/xinntao/CVPR18-SFTGAN/blob/d98889e9f94e44a788cc0ffeaaca77ca76556638/README.md",
      "note": "candidate evidence excerpts"
    }
  ]
}