old_contents: import React, { PropTypes } from 'react'
  import { Link } from 'react-router'
  
  const CourseListRow = ({ course }) => {
  	return (
  		<tr>
  			<td><a href={ course.watchHref } target="_blank">Watch</a></td>
  			<td><Link to={ '/course/' + course.id }>{ course.title }</Link></td>
  			<td>{ course.authorId }</td>
  			<td>{ course.category }</td>
  			<td>{ course.length }</td>
  		</tr>
  	)
  }
  
  CourseListRow.propTypes = {
  	course: PropTypes.object.isRequired
  }
  
  export default CourseListRow
new_contents: import React, {PropTypes} from 'react'
  import {Link} from 'react-router'
  
  const CourseListRow = ({ course }) => {
  	return (
  		<tr>
  			<td><a href={course.watchHref} target="_blank">Watch</a></td>
  			<td><Link to={'/course/' + course.id}>{course.title}</Link></td>
  			<td>{course.authorI }</td>
  			<td>{course.categor }</td>
  			<td>{course.lengt }</td>
  		</tr>
  	)
  }
  
  CourseListRow.propTypes = {
  	course: PropTypes.object.isRequired
  }
  
  export default CourseListRow
  
subject: Update CourseListRow.js