Sentence:  For the purposes of this Act an article shall be deemed to be <WSD>obscene</WSD> if its effector (where the article comprises two or more distinct items) the effect of any one of its items is, if taken as a whole, such as to tend to deprave and corrupt persons who are likely, having regard to all relevant circumstances, to read, see or hear the matter contained or embodied in it. 
Meaning of the word marked with <WSD> tags:  Liable to deprave or corrupt