While I'm writing, the Bund yields 1.82% and the spread to the Oat is 190 bp (source: Financial Times). As a result, the Oat yields 1.82%+1.9%=3.72%. According to the journalist, the OAT yield should be 1.82%*1.9%=3.46%. In order to make things simpler, let's assume that the spread is 200bp (or 2.0%) as reported by the journalist. If the Bund yields 1.8% the Oat yields 1.80%+2.0%=3.80% that is more than two-fold. Conversely, according to the correspondent the Oat should yield 1.80%*2.0%=3.60%! The only way for the journalist to be right, is the scenario in which the Bund yields 2.0% so that the Oat yields 4.0%.
In conclusion, I really expect the TG1 to provide news properly in order to avoid to confuse the audience!