Complex sentence: In the biblical account, the breastplate is sometimes termed the "breastplate of judgement", because the Urim and Thummim, which were, at times, used to determine God's will in a particular situation, were placed within it (see Exodus 28:30).
Split into simpler sentences: In the biblical account, the breastplate is sometimes termed the "breastplate of judgement", because the Urim and Thummim, which were placed within it. These stones were, at times, used to determine God's will in a particular situation (see Exodus 28:30).