Single title with "twoway, by()"

[paulvonhippel]

Using the by() option to the twoway command, I am producing several graphs in a single .gph file. I would like to put a single title that spans all the plots, but I don't see how. Here is a simple illustration:

webuse auto, clear
twoway lfit price weight, by(foreign) title(Automobiles)

I would like the title Automobiles to appear once, spanning both graphs. Instead, it appears twice, once over each graph.

[Andrew Musau]

by(foreign, title(Automobiles))