In R - How do I plot the data from the row where the date=='"2020 Q1' to the last row of the dataframe?

Question

example of the data:

Date	Inflation
2020 Q1	2
2020 Q2	2.1
2020 Q3	2
2020 Q4	2.1

I am using ggplot ggplot(CPI,aes(x=date,y=inflation,group=1))+geom_line() but I would like to only plot from whichever row number that contains date= 2020 Q1 until the last row of the set (which will change everytime as I am getting webscraping the data from a website).