Hello Vulcano,
I hope you don't mind me writing in English.
In 2010 you started an article about Velino Preza. In that article you state a date of birth in 1875 and a year of decease in 1964. On the Dutch Wikipedia there is an article about probably the same composer, :nl:Velino M. Preza Castro. In this article three possible dates of birth are shown, in 1866, 1873 and 1875 and Preza is said to have died on 15 December 1944. Could you help us to get this more clear? Are there more composers with the same name? Where did you find the date of decease? What convinced you the date of birth in 1875 is more possible than the one in 1866? Can we merge :d:Velino Preza and :d:Velino M. Preza Castro or is it wise to keep these as two items, two persons in Wikidata?
The date of decease in 1944 was found in https://web.archive.org/web/20110321004001/http://www.conservatorianos.com.mx/web/Conservatorianos%2010%20para%20web/10aguilarvilchis.htm.
Thanks for your time and answers,