#tag: <open> tag 1  <close>
        #tag: <open> tag 2  <close>
        #tag: <open> tag 3 b  <close>
        #tag: <open> tag 3 a  ARRAY(0x1a55ad8) tag 3 c  <close>
        #tag: <open> tag 4 b  <close>
        #tag: <open> tag 4 d  <close>
        #tag: <open> tag 4 c 
        #         ARRAY(0x1a8f664) tag 4 e 
        #     <close>
        #tag: <open> tag 4 a 
        #     ARRAY(0x1a8f670) tag 4 f
        # <close>