Try the following code:
sentence <- c("case sweden", "meeting minutes ht board meeting st march now also attachment added agenda today s board meeting", "draft meeting minutes board meeting final meeting minutes ht board meeting rd april")
dd <- read.table(text = paste(sentence, collapse = '\n'), fill = TRUE)
test <- cbind(sentence, dd)
or
cc <- read.table(text = paste(gsub('\n', '', sentence), collapse = '\n'), fill = TRUE)
test1 <- cbind(sentence, cc)