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In page Dead Sea Scrolls:

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Spanish Jesuit José O'Callaghan Martínez argued in the 1960s that one fragment (7Q5) preserves a portion of text from the New Testament Gospel of Mark 6:52–53.[1] This theory was scrutinized in the year 2000 by paleographic analysis of the particular fragment. However, this faced some contention, and O'Callaghan's theory remains an area of great dispute. Later analyses in 2004 and 2018 lent credence to O'Callaghan's original assertion.[citation needed]