ambiguity in conditional statement

A. F. L. beneficiation method compound nucleus embryo crystal endothrix guttulinopsis nivea hygrohypnum montanum (wils)broth interfering energy interlock control liming process lower limiting frequency market-relateds one-pipe circuit (cross-over) heating system pericardiophrenic Petri's tests picture intermediate freaquency circuit powder structure determination prairie mimosas sphenomeris chusana copel. thorium breeder