having circles and text show up together-call data twice

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
  </style>
</head>

<body>
  <script>
	var svg = d3.select("body").append("svg")	
  	.attr("width", 1000)
  	.attr("height", 1000)
  d3.json("data.json", function(error, json)  {
  d3.select("svg").selectAll("circle")
    	.data(json)
   		.enter()
   		.append("circle") 
  			.attr("cy", function (d) {return d.start})
    		.attr("cx", function(d) {return  d.start})
  	  	.attr("r", 50)
    		.attr("fill", "red")
    		.style("stroke", "black")
    		.style("stroke-width", 3)});
    
  //call the data again and make a new svg
  d3.json("data.json", function(error, json)  {
  d3.select("svg").selectAll("text")
    	.data(json)
   		.enter()
    	.append("text")
   			.text(function(d) {return "circle" + " " + d.name})
        .attr("y", function (d) {return d.start})
        .attr("x", function (d) {return d.stop-40})
        .style("font-size", 10)
        .style("font-family", "monospace");
  })
  </script>
</body>

https://d3js.org/d3.v4.min.js