How can I obtain b parameter from MIRT in R

General
1

I am using mirt to Rasch model as following
mod1 <- mirt(resp, 1, itemtype = "Rasch")

I used the following R code trying to get item difficulty , but I can't get the b parameter directly.
coef(mod1, simplify=TRUE)

Any help would be much appreciated. thanks!

2

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