rtokens: Iran subsequently said it regretted the incident , which it said had been the result of a misunderstanding .
pos: DT JJ NN VBD RB VBN TO DT NN IN NNP TO VB DT JJ NN CC " NN IN DT VBG NN IN DT NNS IN JJ NN " , PRP VBD .
tokens: The Iranian ambassador was also summoned to the ministry in Bonn to hear a sharp protest and " disapproval of this glaring breach of the principles of international law " , he added .
ltokens: The ministry spokesman said the German embassy immediately made a sharp protest to the Tehran government .