Complex sentence: In 20th-century Maya communities, curers and diviners may show some features of true shamans (such as vocation through illness, trance, communication with a spirit), for which reason they are often loosely called'shamans' by ethnographers.
Split into simpler sentences: In 20th-century Maya communities, curers and diviners may show some features of true shamans, particularly vocation through illness, trance, and communication with a spirit. In reference to these features, they are often loosely called'shamans' by ethnographers.