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]:  No blood flow signal was observed in the masses of 13 cases ( 3 of metastatic adenocarcinoma , 5 of adenoma , 5 of polypus ) .
[A]: blood


[Q]:  These new recommendations and revelations open the door for local antimicrobial approaches to reduce the challenge of plaque - induced bacteremias .
[A]: plaque


[Q]:  Allergen and particle dose - response experiments in BALB / cA and NIH mice Levels of serum OVA - specific IgE ( A , D ) , IgG1 ( B , E ) and IgG2a ( C , F ) on day 26 after injection into one hind footpad of 100 ( open columns ) , 50 ( gray ) or 10 ( black ) mug OVA combined with 100 , 40 , 10 or 0 mug PSP , or buffer ( HBSS ( hatched ) ) , in BALB / cA ( A , B , C ) and NIH ( D , E , F ) mice .
[A]:
serum