For instance , the birds are not usually try to remeber the subjects what they have passed by , such as a stone , a building , or even a small house .
For instance , the birds are not usually trying to remember the subjects that they have passed by , such as a stone , a building , or even a small house . For instance , the birds do not usually try to remember the subjects which they have passed by , such as a stone , a building , or even a small house . For instance , the birds are not usually trying to remember the subjects that they have passed by , such as a stone , a building , or even a small house . For instance , the birds do not usually remember the objects they have passed by , such as a stone , a building , or even a small house .