How to calculate blood alcohol level<br>Understand what blood alcohol content (bac) means. Blood alcohol content is a measurement of the amount of alcohol in your body. So, a bac of 0.10% means 1 part alcohol for every 1000 parts of blood.
The term "bac" means blood alcohol content. 
( z1 mean :ARG1 ( z2 term :mod ( z3 bac ) ) :ARG2 ( z4 content :mod ( z5 alcohol :mod ( z6 blood ) ) ) )