title: With Graphicsmagick, how to combine 2 images and text in a certain format?
body: <p>I need to combine 2 images and a short text into one image, in the format that the first image is at the top spanning a row, and the other image at bottom left, the text at bottom right.</p>
  
  <p>The produced image is 400px * 600px, the input images can be any size, if the first image is less than  400px, it will be centered at the top</p>
  
  <p>Is it possible with Graphicsmagick? </p>