TASK DEFINITION: In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
PROBLEM: The effect of mountain chains on winds is to carry warm air belonging to the lower region into an upper zone , where it expands and loses heat , and drops snow or rain .

SOLUTION: The effect of mountain chains on prevailing winds is to carry warm air belonging to the lower region into an upper zone , where it expands in volume at the cost of a proportionate loss of temperature , often accompanied by precipitation in the form of snow or rain .

PROBLEM: In a graph where all the edges have the same weight , every tree is a minimum spanning tree .

SOLUTION: There may be several minimum spanning trees of the same weight ; in particular , if all the edge weights of a given graph are the same , then every spanning tree of that graph is minimum .

PROBLEM: Arizona is one of the elected members of the Association of American Universities ( an organization for research institutions ) .

SOLUTION:
The University of Arizona is one of the elected members of the Association of American Universities ( an organization of North America 's premier research institutions ) and is the only representative from the state of Arizona to this group .