Complex sentence: The most probable derivation is from the demonym "Vallisoletano" (which in fact is the Spanish demonym of the city), meaning "from sunny valley"-in Middle Ages texts the city is stated as "vallisoletum" (see the painting above).
Split into simpler sentences: The most probable derivation is from the demonym "Vallisoletano" (which is, in fact, the Spanish demonym of the city), meaning "from sunny valley". Indeed, texts from the Middle Ages call the city "vallisoletum" (see the painting above).