In this task, you are given a sentence. You are expected to write the name of the organism substances in the body mentioned in the input. Although there might be several correct answers, you need to write one of them.

[Q]:  Values for individual samples ( circles ) and group median values ( columns ) are shown .
[A]: samples


[Q]:  If a sample ' s results met any of these three criteria , then the sample was evaluated as a pathogen .
[A]: sample


[Q]:  Data from this study suggest that there may be a time - dependent relationship between dexamethasone immunosuppression and the fecal concentration of E . coli O157 but that transient immunosuppression does not appear to prolong shedding of E . coli O157 .
[A]:
fecal


