Complex sentence: Others argue that the two figures and the inscription signal the deliberate imitation of a Roman coin, the inspiration deriving from a sestertius of Plotina when Cristoforo was making his medal of Constantine.
Split into simpler sentences: Others argue that the two figures and the inscription signal the deliberate imitation of a Roman coin. The probably, deliberate inspiration came from a sestertius of Plotina when Cristoforo was making his medal of Constantine.