I'm not entirely sure I understand your questions, but if you are looking for a cause & effect dataset, then I would look for a control experiment datasource. For example, this study about "Sexual Activity and the Lifespan of Male Fruitflies" from Hanley & Shapiro http://www.amstat.org/publications/jse/v2n1/datasets.hanley.html was a control experiment and you can download the dataset here http://www.amstat.org/publications/jse/datasets/fruitfly.dat.txt
Moreover, [essential relief supplies such as ice must be distributed throughout the population]Effect [because of]Trigger [potential health problems from spoiled food and possible outbreak of disease.]Cause
Thank you very much. Yes, I am looking these kind of datasets (Aviation Safety Reporting System). Unfortunately, I could not find ASRS report (http://asrs.arc.nasa.gov/index.html). So, can you please tell me how can I get that one?