Find the strongly connected components of the graph. 
Definitions:
Independent Variables
Factors in an experiment that are intentionally changed to observe their effect on dependent variables.
Placebo
A compound that does not have any healing properties, employed as a standard in evaluating new medications.
Demand Characteristics
Demand characteristics refer to the subtle cues or signals that can influence participants’ behavior in experiments, biasing the results.
Representative
Someone who acts or speaks on behalf of others, often in a professional setting or within legislative bodies.
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