Complex sentence: Of the six glass bottles in the woman's sarcophagus and the ten vessels in the man's sarcophagus, only one actually still was containing a fluid a clear liquid in the bottom third, and a mixture similar to rosin above.
Split into simpler sentences: Of the six glass bottles in the woman's sarcophagus and the ten vessels in the man's sarcophagus, only one still contained a liquid. There is a clear liquid in the bottom third, and a mixture similar to rosin above.