some evaluates as true if there is at least one episode for which a statement is true. For example, given the following case fragment:
05 Feb 03 06 Oct 03 07 Nov 03 HDL [2, 5.5] 7.3* 4.8 6.1* LDL 1.1 0.8 pending Trig 2.2 0.5*
some HDL are high
some Trig is not available