[a] [mom] [is] [a] [human] [.] 

[a] [dad] [is] [a] [human] [.] 

[a] mom is a parent . 
0 ###LEFT-WALL### 2 mom
2 mom 5 parent
3 is 4 a
4 a 5 parent
5 parent 6 .

[a] dad is a parent . 
0 ###LEFT-WALL### 2 dad
2 dad 5 parent
3 is 4 a
4 a 5 parent
5 parent 6 .

[a] [son] [is] [a] [child] [.] 

[a] [daughter] [is] [a] [child] [.] 

[a] [son] [is] [a] [human] [.] 

[a] [daughter] [is] [a] [human] [.] 

[a] mom likes cake . 
0 ###LEFT-WALL### 2 mom
2 mom 4 cake
3 likes 4 cake
4 cake 5 .

[a] daughter likes cake . 
0 ###LEFT-WALL### 2 daughter
2 daughter 4 cake
3 likes 4 cake
4 cake 5 .

[a] son likes sausage . 
0 ###LEFT-WALL### 2 son
2 son 4 sausage
3 likes 4 sausage
4 sausage 5 .

[a] dad likes sausage . 
0 ###LEFT-WALL### 2 dad
2 dad 4 sausage
3 likes 4 sausage
4 sausage 5 .

[cake] [is] [a] [food] [.] 

[sausage] [is] [a] [food] [.] 

[mom] [is] [a] [human] [now] [.] 

[dad] [is] [a] [human] [now] [.] 

mom is a parent now . 
0 ###LEFT-WALL### 1 mom
1 mom 4 parent
2 is 3 a
3 a 4 parent
4 parent 5 now
5 now 6 .

dad is a parent now . 
0 ###LEFT-WALL### 1 dad
1 dad 4 parent
2 is 3 a
3 a 4 parent
4 parent 5 now
5 now 6 .

[son] [is] [a] [child] [now] [.] 

[daughter] [is] [a] [child] [now] [.] 

[son] [is] [a] [human] [now] [.] 

[daughter] [is] [a] [human] [now] [.] 

mom likes cake now . 
0 ###LEFT-WALL### 1 mom
1 mom 3 cake
2 likes 3 cake
3 cake 4 now
4 now 5 .

daughter likes cake now . 
0 ###LEFT-WALL### 1 daughter
1 daughter 3 cake
2 likes 3 cake
3 cake 4 now
4 now 5 .

son likes sausage now . 
0 ###LEFT-WALL### 1 son
1 son 3 sausage
2 likes 3 sausage
3 sausage 4 now
4 now 5 .

dad likes sausage now . 
0 ###LEFT-WALL### 1 dad
1 dad 3 sausage
2 likes 3 sausage
3 sausage 4 now
4 now 5 .

[cake] [is] [a] [food] [now] [.] 

[sausage] [is] [a] [food] [now] [.] 

[mom] [was] [a] [daughter] [before] [.] 

[dad] [was] [a] [son] [before] [.] 

[mom] [was] [not] [a] [parent] [before] [.] 

[dad] [was] [not] [a] [parent] [before] [.] 

[mom] [liked] [cake] [before] [.] 

dad liked sausage before . 
0 ###LEFT-WALL### 1 dad
1 dad 2 liked
2 liked 3 sausage
2 liked 4 before
4 before 5 .

[cake] [was] [a] [food] [before] [.] 

sausage was a [food] before . 
0 ###LEFT-WALL### 2 was
1 sausage 2 was
2 was 3 a
2 was 5 before
5 before 6 .