annotation = item.annotations.get(annotation_id='annotation_id')

# 
# Get a single annotation.
# 
# **Prerequisites**: You must have an item that has been annotated. You must have the role of an *owner* or
# *developer* or be assigned a task that includes that item as an *annotation manager* or *annotator*.
# 
# :param str annotation_id: The id of the annotation
# :return: Annotation object or None
# :return: Annotation object or None
# :rtype: dtlpy.entities.annotation.Annotation
# 
#