I have a dataset which looks like this:

```
"user.get","search_restaurants","cuisines.get"
"user.get","search_restaurants","user.get","search_restaurants"
"order/address/get_user_addresses"
"search_restaurants","search_restaurantssearch_restaurants"
"restaurant.get","search_restaurants","order/menu","restaurant.get","restaurant.get","restaurant.get","order/menu","order/menu","restaurant.get","restaurant.getsearch_restaurantsrestaurant.get","user.get","order/menu","order/menu","get_user_reviews_filtered","order/menu","restaurant.get"

```

When I run the apriori algorithm on it:

```
txn1 = read.transactions(file="path", rm.duplicates=TRUE)
basket_rules <- apriori(txn1, parameter = list(sup = 0.01, conf = 0.01,target="rules"))
inspect(basket_rules)

```

I get blank lhs's. which are:

`{} => {cuisines.get}`, etc

Any idea why this might be happening? An how to solve this issue?