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+graph ER {

+	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;

+}