| http://www.w3.org/ns/prov#value | - For each of my long-term observation projects, i have always been anxious because one can never be sure that the protagonists can stand it until the end of the period agreed. to my great surprise, it has always gone smoothly so far. the problem is that it is impossible to sign some sort of contract that in given conditions, the protagonists cannot pull out. so at the outset, there is the dramati
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