The current .ogg and .svg links have not been handled properly.
In the Barack Obama article, the "listen" link that contains a .ogg file URL and it should be considered as a "media" link, which should send the media_clicked event
https://en.wikipedia.org/api/rest_v1/page/mobile-html/Barack_Obama
In the Family Guy article, the .svg icons on the bottom of the article should be considered as an "image" link, which should send the image_clicked event
https://en.wikipedia.org/api/rest_v1/page/mobile-html/Family_Guy