How to add title to xline

[Anagaw Derseh]

Can you help me how I can specify the vertical line while I am using "twoway connected" command to show the relation between yvar and xvar using line graph? For instance, how can I add description for the xline as "start" similar to the graph attached? you can use any time series data as example.

[Scott Merryman]

webuse grunfeld,clear
twoway connected kstock year if company == 1, /// 
xline(1940) xlabel( 1940 "Start" , axis(2)) xaxis(1 2) /// 
xtitle("" , axis(2))

[Ali Atia]

clear
set obs 45
gen time = _n+1935
gen y = _n*runiform()
twoway connected y time, xaxis(1 2) xline(1940) xlabel(1940 "start", axis(2)) xtitle("",axis(2))

[Anagaw Derseh]

Dear Scott Merryman and Ali Atia, thank you so much this works for me!