Gerard Koopman writes this on his own website:

In Erica, also in the immediate vicinity of New Amsterdam, Ep Poelman had a dove that flew the tiles of the roof. Almost unbelievably, the results of this crack. We are talking about "Black Power" NL-93-1767197, from a cross Janssen X Meulemans sprang. Gerard had this pigeon in his sights for some time and then publicly sold from Ep Poelman came, there was no question what went along to New Amsterdam. Gerard bought the "Black...