text: <unk>  is expectorated matter especially from the air passages in diseases of the lungs, bronchi, or upper respiratory tract. It is matter that is coughed up from the respiratory tract, such as mucus or phlegm, mixed with saliva and then expectorated from the mouth.
option_0: Sputum
option_1: Exudate
option_2: Blood
option_3: Pleural effusion laboratory findings
option_4: Bacterial pneumonia physical examination
option_5: Lung abscess laboratory findings
option_6: Serum
option_7: Pleural effusion physical examination