# Wikidata Support in the Creation of Rich Semantic Metadata for Historical Archives
## 5 Evaluation and Discussion
Moreover, a significant number of users (24%) reported, more specifically, that he was a member of the CLN (_Comittato di Liberazione Nazionale_), he was kept in prison (from where he escaped), he was exiled in France, he was director of the _Araniti!_ newspaper, all relevant data for the characterization of his life, according to users, and missing from our suggestions. 2. Many participants (32%) wrote that the information suggested for [PERSON] and referring to his different roles in different Italian Governments was too scattered and redundant, due to the specification, as distinct items, of all the periods of times in which he played each role (e.g., _Prime Minister of Italy_, _Italian Minister of Foreign Affairs_, and so on). Moreover, a significant number of users (54%) stated that suggestions about [PERSON] miss information about his kidnapping and details about his homicide, in particular when and where it took place, and, most important, that he was killed by _Brigate Rosse_ (the well-known Italian terrorist organization). Finally, some participants (11%) remark that his important role in the discussion about the _Compromesso Storico_ (the possible political agreement between _Democrazia Cristiana_ and _Partito Comunista_ parties in the 1970s) is missing. 3. [PERSON] was the less known figure we proposed, and Wikidata itself contains less data with regard to the other analyzed persons: For instance, a couple of users reported missing information about his education and his family. A significant \begin{table}
\begin{tabular}{l c c c c c} \hline \hline  & **[PERSON]** & **[PERSON]** & **[PERSON]** & **[PERSON]** & **Overall** \\ \hline used info (as it is or with modification)—_options [a]+[b]_ & 82\% & 81\% & 82\% & 83\% & 82\% \\ missing info—_option [f]_ & 49\% & 62\% & 35\% & 65\% & 53\% \\ too much info—_option [h]_ & 11\% & 41\% & 0\% & 0\% & 13\% \\ too little info—_option [i]_ & 22\% & 19\% & 30\% & 62\% & 33\% \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Results (percentage of answers). Options refer to Appendix A.  
number of participants (19%) notice that he had an important role in CGIL Trade Union, and this information is missing. A single, but very important, comment underlines that the birth date of [PERSON] is wrong (Wikidata says 8 April 1927--www.wikidata.org/wiki/Q338536, accessed on 10 May 2021), while the correct date is 18 May 1926--it.wikipedia.org/wiki/[PERSON], accessed on 10 May 2021). 4. A lot of comments (51% of users) report that suggestions about [PERSON] lack information about his fight against the Mafia, and in particular, his role in important trials against such a criminal organization, such as the well-known _Maxiprocesso_. Moreover, a number of users (14%) complain about the lack of important details about his homicide, such as where and when it took place, or the fact that the killers were affiliated to the Mafia, or that other people died in that massacre, such as his wife ([PERSON]) and his bodyguards. Finally, a few participants (8%) remark that his relationship with [PERSON] (a well-known Italian magistrate who closely collaborated with [PERSON]) is totally missing. 5. There are some general comments that do not refer to any specific person analyzed but represent interesting feedback for us. Some users remarked that the information about the affiliation of a person to a university, together with the information that he was a student, or a professor, at that university, is redundant. A user wrote that too many suggestions (such as, for instance, in the case of political roles for [PERSON]) could take a long time to be checked, and this can become an overload instead of help for users. A lot of remarks by participants refer to missing information. In many cases, this is not due to a limitation of our mappings but to the fact that the information is simply missing in Wikidata.