Sorry, but I have no idea what you are talking about, moon. The original sentence about Prof Lee and Prof Kim is incorrectly composed. Also, 'preface' in that sentence is the direct object of 'write', not a complement.
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moon7296Again, there is only a past form (wrote) of a verb write. So putting '<= is wrong because a normal form of a verb write can not be found in the example sentence as a quatationQuotation marks are not used solely for indicating direct quotations. They are also used in four other situations: (1) when you mean so-called-but-not-really <e.g. if he'