Q: 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.
 In this study a neural network ( NN ) model was designed to predict lycopene and beta - carotene concentrations in food samples , combined with a simple and fast technique , such as UV - vis spectroscopy .
A:
samples