Identify the phrase as an adjective phrase or an adverb phrase

1. about a football player-adjective phrase
2. by his achievements- adjective
3. in the front yard-adverb

Out of context, it's hard to tell. Do these have sentences?

He was playing in the front yard. <~~yes adverb
He was playing on the swing in the front yard. <~~adjective

Please clarify all three.

1. Brian's song is an inspiring story about a football player.

2 The selection committee was impressed by his achievements.

3. That rosebush in the front yard had seen better days.

... and your re-thought-out answers?

Remember that adjective phrases modify nouns or pronouns, and adverb phrases modify verbs, verb forms ...
http://www.chompchomp.com/terms/prepositionalphrase.htm
Scroll down to Understand what prepositional phrases do in a sentence.

To identify whether a phrase is an adjective phrase or an adverb phrase, you need to determine which part of speech the phrase is modifying.

1. "About a football player" - This phrase is modifying the noun "football player." It describes what kind of player, so it is an adjective phrase.

2. "By his achievements" - This phrase is modifying the verb or action of "achievements." It describes how the achievements were obtained, so it is an adverb phrase.

3. "In the front yard" - This phrase is modifying the verb or action that occurred "in the front yard." It describes where the action took place, so it is an adverb phrase.