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stick to correctly or closely;
make mention of;
observe with care or pay close attention to;
discover or determine the existence, presence, or fact of; "
follow with the eyes or the mind;
show respect towards;
behave as expected during of holidays or rites;
conform one's action or practice to;
discovered or determined by scientific observation; "variation in the ascertained flux depends on a number of factors"; "the discovered behavior norms"; "discovered differences in achievement"; "no explanation for the observed phenomena"