p[0.9,0.9]	PEOPLE are LOWPOLLUTION;

	p[0.3,0.3]		PEOPLE are SMOKERS;

	p[0.27,0.27]	PEOPLE are (LOWPOLLUTION and SMOKERS);

	p[0.05,0.05]	(PEOPLE and (not LOWPOLLUTION) and SMOKERS) are CANCER;	

	p[0.02,0.02]	(PEOPLE and (not LOWPOLLUTION) and (not SMOKERS)) are CANCER;

	p[0.03,0.03]	(PEOPLE and LOWPOLLUTION and SMOKERS) are CANCER;
	
	p[0.001,0.001]	(PEOPLE and LOWPOLLUTION and (not SMOKERS)) are CANCER;

	p[0.65,0.65]	(PEOPLE and CANCER) are DYSPNOEA;

	p[0.3,0.3]	(PEOPLE and (not CANCER)) are DYSPNOEA;

	p[0.31,0.31]	(PEOPLE and (not LOWPOLLUTION)) are DYSPNOEA;
			
?:	p[]	 (PEOPLE and DYSPNOEA) are (not LOWPOLLUTION);