text: #pragma once
  #include <string>
  
  using std::string;
  
  class AuthorRelation {
  public:
  	int pid1;
  	int pid2;
  	double similarity;
  	string rel_type;
  	AuthorRelation(int _pid1, int _pid2,double _similarity,string _rel_type);
  	AuthorRelation();
  	~AuthorRelation();
  };
  