I am summarizing the descriptions again for you to choose the best language. The first photograph in the office: not only that the circumstance or reason for taking it is trivial (it was completely accidental) but there is no possibility of even establishing the original authorship. The same applies to the almost 50-year-old photograph (by the way, in the former Yugoslavia copyright laws were 50 years, not 100, if it has not been changed recently; the one, not in the article, but at the Wikipedia upload and below this one [with the mother] is more than 50 years old ). In any case, even with that photograph, the circumstance and reasons were trivial; therefore not only that the original authorship cannot be established, it is also legally nonexistent. The third and the fourth photographs were taken by cousins, without any intent of establishing copyrights or authorships, and like in the first two cases almost accidentally (the third photograph taken in the park just because the camera was accidentally there and there was no special intent of taking that photograph or establishing authorship). The fourth one was under similar circumstance and without any desire to establish an authorship or copyright. Note: The circumstances under which these photographs were taken and the reasons of the people who took them (although in the case of the first two there is no way to ever find out who took them) are, we can say—trivial, and exclude any possibility of infringement.  Photographs are simply ineligible. This is the general explanation and maybe you can sort it out in a better way.  Here are the links: http://en.wikipedia.org/wiki/File:Dejan_Stojanovic,_Chicago.jpg  http://en.wikipedia.org/wiki/File:Dejan_Stojanovic_21.jpg  http://en.wikipedia.org/wiki/File:Dejan_Stojanovic,_1981.jpg  http://en.wikipedia.org/wiki/File:Dejan_Stojanovi%C4%87_and_Prince_Nicholas_Petrovi%C4%87_Njego%C5%A1_of_Montenegro.jpg  I appreciate your help very much. Thanks.     