With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Charlie Chaplin had a parent.
text_B: Airway management includes a set of maneuvers and medical procedures performed to both prevent airway obstruction and relieve it .. airway obstruction. airway obstruction. This ensures an open pathway for gas exchange between a patient 's lungs and the atmosphere .. This is accomplished by either clearing a previously obstructed airway ; or by preventing airway obstruction in cases such as anaphylaxis , the obtunded patient , or medical sedation .. airway obstruction. airway obstruction. anaphylaxis. anaphylaxis. obtunded. Obtundation. Airway obstruction can be caused by the tongue , foreign objects , the tissues of the airway itself , and bodily fluids such as blood and gastric contents -LRB- aspiration -RRB- .. aspiration. Pulmonary aspiration. Airway management is commonly divided into two categories  : basic and advanced .. basic. Basic airway management. advanced. Advanced airway management. Basic techniques are generally non-invasive and do not require specialized medical equipment or advanced training .. advanced. Advanced airway management. These include head and neck maneuvers to optimize ventilation , abdominal thrusts , and back blows .. abdominal thrusts. abdominal thrusts. Advanced techniques require specialized medical training and equipment , and are further categorized anatomically into supraglottic devices -LRB- such as oropharyngeal and nasopharyngeal airways -RRB- , infraglottic techniques -LRB- such as tracheal intubation -RRB- , and surgical methods -LRB- such as cricothyrotomy , and tracheotomy -RRB- .. oropharyngeal. Oropharyngeal airway. tracheal intubation. tracheal intubation. surgical methods. Surgical airway management. cricothyrotomy. cricothyrotomy. tracheotomy. tracheotomy. Airway management is a primary consideration in the fields of cardiopulmonary resuscitation , anaesthesia , emergency medicine , intensive care medicine , and first aid .. cardiopulmonary resuscitation. cardiopulmonary resuscitation. anaesthesia. anaesthesia. emergency medicine. emergency medicine. intensive care medicine. intensive care medicine. first aid. first aid. Airway represents the `` A '' In the ABC treatment mnemonic .. ABC treatment. ABC ( medicine ). mnemonic. mnemonic
not_related.