Writing blogs and posting charts

Believe it or not I got a nasty notice from Google saying I used copy write material. There was a web site that must cruise the blogs to check this out. Now I can understand not using someones writings if it  world changing. but a chart of the nutrient value of a potato? I think  it was more of a notice that my blogs are being read by this creepy web site for what ever reason. I am sure the nutrient value of potatoes is not a  private thing. I hope the whoever this is does not think that this is some one elses blog.