Given a text, write a compressed version of it in a single sentence.

Example Input: In Docket R90-1, the variability or elasticity of evaluated rural route costs with respect to volume was estimated at 44 percent by the Postal Service.
Example Output: The elasticity of rural route costs with respect to volume was estimated at 44 percent.

Example Input: In the field of early childhood education, Piaget's theory sparked preschool classrooms emphasizing discovery learning through children's spontaneous interaction with the environment. Rather than teaching didactically, teachers in Piagetian-based settings provide a rich variety of hands-on activities and encourage children's exploration and experimentation.
Example Output: Piaget's theory sparked classrooms discovery learning through interaction with the environment. Teachers in Piagetian-based settings provide hands-on activities, and encourage children's exploration and experimentation.

Example Input: More recently, screens have been developed to detect at-risk drinkers. WHO developed the AUDIT (Alcohol Use Disorder Identification Test) in 1992 as a brief screening tool to detect at-risk drinking in addition to alcohol abuse and dependence.
Example Output:
WHO recently developed the AUDIT (Alcohol Use Disorder Identification Test) in 1992 as a brief screening tool to detect at-risk drinking, alcohol abuse and dependence.