graph_run_run2.pbtxt

node {
  name: "a"
  op: "matmul"
}
node {
  name: "b"
  op: "matmul"
  input: "a:0"
}
node {
  name: "c"
  op: "matmul"
  input: "a:0"
  input: "b:0"
}