救救flickr死link

如何從flickr死link尋回原來的照片:

(1) 死link:
http://farm5.static.flickr.com/4090/5048130724_b6087a688f.jpg

(2) 取最後一段underscore前的部份: 即 5048130724

(3) https://www.flickr.com/photos/用戶名/5048130