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components/SectionHeader.jsx

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+var React = require("react");
+var ReactDOM = require("react-dom");
+
+var SectionHeader = React.createClass({
+  render: function() {
+    return <h2 data-num={this.props.number}>{this.props.children}</h2>;
+  }
+});
+
+module.exports = SectionHeader;