sentences:  In the 1930s the site was investigated by a team of scholars from Melitopol under Valentin Danylenko (1913–82).The young archaeologist claimed to have discovered thirty caves with petroglyph inscriptions which he dated from the 20th century BC to the 17th century AD.Danylenko resumed his work on the site after World War II and claimed to have discovered thirteen additional caves with petroglyphs.