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.

[EX Q]: Neural network analysis of spectroscopic data of lycopene and beta - carotene content in food samples compared to HPLC - UV - vis .
[EX A]: samples

[EX Q]: Lactotransferrin inhibits ADP - induced platelet aggregation at concentrations down to 5 nM , which can be reached in the plasma after leukocyte degranulation .
[EX A]: plasma

[EX Q]: The placenta biopsy sample was collected at a depth of 1 cm and at a distance of 8 cm from the edge of the placenta , with the maternal side facing upward .
[EX A]:
sample