Complex sentence: The black bean aphid is a small, soft-bodied insect in the order Hemiptera, the members of which have specialised piercing and sucking mouthparts which are used to suck plant juices.
Split into simpler sentences: The black bean aphid is a small, soft-bodied insect in the order Hemiptera. It has specialised piercing and sucking mouthparts, which are used to suck plant juices.