Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Cave of Altamira and Paleolithic Cave Art of Northern Spain' has mentioned 'Prehistoric' in the following places:
Occurrence Sentence Text Source
Cave and archaeological site with prehistoric paintings in Spain
It is renowned for prehistoric parietal cave art featuring charcoal drawings and polychrome paintings of contemporary local fauna and human hands.
Aside from the striking quality of its polychromatic art, Altamira's fame stems from the fact that its paintings were the first European cave paintings for which a prehistoric origin was suggested and promoted.
However, the publication of Sanz de Sautuola's research quickly led to a bitter public controversy among experts, some of whom rejected the prehistoric origin of the paintings on the grounds that prehistoric human beings lacked sufficient ability for abstract thought.
The controversy continued until 1902, by which time reports of similar findings of prehistoric paintings in the Franco-Cantabrian region had accumulated and the evidence could no longer be rejected.
It was not until 1902, when several other findings of prehistoric paintings had served to render the hypothesis of the extreme antiquity of the Altamira paintings less offensive, that the scientific society retracted their opposition to the Spaniards.
The comic series depicts the adventures of a group of prehistoric cavemen, shown as modern people, but dressed in pieces of fur, a bit like the Flintstones.