Given a sentence, judge the quality of this sentence by indicating "Good" and "Bad". The quality depends on the grammar and the meaning of the sentence. If a sentence is easily understandable, and doesn't have grammatical errors, answer with "Good", otherwise answer with "Bad".

[EX Q]: Efficiencies that result when multiple systems are installed at one side. In engineering alone, there is a 10-15% savings in management labor commonly realized when installing units.
[EX A]: Bad

[EX Q]: The custom of breaking a pinata during the Christmas Mass was introduced in the 17th century. Later the custom of celebrating many Christmas Masses evolved into Las Posadas.
[EX A]: Good

[EX Q]: Competition is believed to lead to efficiency method of introducing competition into postal systems, without affecting the universal service obligation is "worksharing" discounts.
[EX A]:
Bad