prob joe: 5/7.
prob william: 5/7.
prob jack: 5/7.
prob averall: 5/7.

joeWorks <- joe.
jackWorks <- jack & joe.
williamWorks <- william.
averallWorks <- averall & jack & william.

burglary <- joeWorks & jackWorks.
burglary <- joeWorks & williamWorks.
burglary <- joeWorks & averallWorks.
burglary <- jackWorks & williamWorks.
burglary <- jackWorks & averallWorks.
burglary <- williamWorks & averallWorks.