graph ER {
	fontname="Helvetica,Arial,sans-serif"
	node [fontname="Helvetica,Arial,sans-serif"]
	edge [fontname="Helvetica,Arial,sans-serif"]
	layout=neato
	node [shape=box]; course; institute; student;
	node [shape=ellipse]; {node [label="name"] name0; name1; name2;}
		code; grade; number;
	node [shape=diamond,style=filled,color=lightgrey]; "C-I"; "S-C"; "S-I";

	name0 -- course;
	code -- course;
	course -- "C-I" [label="n",len=1.00];
	"C-I" -- institute [label="1",len=1.00];
	institute -- name1;
	institute -- "S-I" [label="1",len=1.00];
	"S-I" -- student [label="n",len=1.00];
	student -- grade;
	student -- name2;
	student -- number;
	student -- "S-C" [label="m",len=1.00];
	"S-C" -- course [label="n",len=1.00];

	label = "\n\nEntity Relation Diagram\ndrawn by NEATO";
	fontsize=20;
}