R help - Jan 2019 - create a network for a small text df

Hi all,

I have a small dataframe and I would like to show in a network plot how words
are related to the word "problem" with arrows (keeping the order of
the words in sentences).
Here's the df:

     
     dput(df) 
     structure(list(text = structure(c(1L, 7L, 3L, 4L, 5L, 6L, 2L), .Label =
c("account block solv problem",
     "exactly problem morning", "investigate similar
problem", "matched problem control vec",      "problem also
accour yesterday", "same problem jj ", "same problem
uk"
      ), class = "factor")), class = "data.frame", row.names
= c(NA,
    -7L))

So far I have tried plotting each row a a network as following:


    
  library(igraph)
 
net=graph(c("account","block","block","solve","solve","problem"))
  plot(net)

but I will end up having 7 plots, is there a better way?
thanks for any help.
Elahe.